Arithmetic mean Essays & Research Papers

PROBLEMS FOR RELAIBILITY 1. Consider the following system: Determine the probability that the system will operate under each of these conditions: a. The system as shown. b. Each system component has a backup with a probability of .90 and a switch that is 100 percent reliable. c. Backups with .90 probability and a switch that is 99 percent reliable.Solutions 1. a. P(operate) = .92 = .81 .9 .9 .9 .9 .9 .9 .9 .9 b. [.90 + .10(.90)] [.90 + .10(.90)] = .9801 c. [.90...

Measuring Service Quality Using SERVQUAL Introduction Measuring the quality of a service can be a very difficult exercise. Unlike product where there are specific specifications such as length, depth, width, weight, colour etc. a service can have numerous intangible or qualitative specifications. In addition there is there expectation of the customer with regards the service, which can vary considerably based on a range of factors such as prior experience, personal needs and what other...

STATISTICS FOR MANAGEMENT – SET (1) 1) WHY IT IS NECESSARY TO SUMMARISE DATA? EXPLAIN THE APPROACHES AVAILABLE TO SUMMARIZE THE DATA DISTRIBUTIONS? ➢ Graphical representation is a good way to represent summarised data. However, graphs provide us only an overview and thus may not be used for further analysis. Hence, we use summary statistics like computing averages. to analyse the data. Mass data, which is collected, classified, tabulated and presented systematically, is analysed...

Gulf Real Estate Properties Gulf Real Estate Properties, Inc., is a real estate firm located in southwest Florida. The company, which advertises itself as “expert in the real estate market,” monitors condominium sales by collecting data on location, list price, sale price, and number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course, near but not on the...

Answer the following problems showing your work and explaining (or analyzing) your results. 1. Describe the measures of central tendency. Under what condition(s) should each one be used? Mean- Works good when it comes to test scores Median- should be used when describing something like average income. Mode= is good is you want to see what is you best seeing product in a store situation. 2. Last year, 12 employees from a computer company retired. Their ages at retirement are listed...

 Question 1 1 out of 1 points Questions 1 through 4 refer to the following: According to the US Department of Health and Human Services, the percentage of adults who smoked cigarettes in 2011 was 19%. A survey of 500 adults taken in 2012 found 85 who smoke. The researcher is interested in finding evidence at the .05 significance level of a decrease from 2011 to 2012 in the proportion of US adults who smoke. Which of the following pairs of hypotheses is suggested by the scenario...

Final Exam Review Questions You should work each of the following on your own, then review the solutions guide. DO NOT look at the solutions guide first. 1. Explain the difference between a population and a sample. In which of these is it important to distinguish between the two in order to use the correct formula? mean; median; mode; range; quartiles; variance; standard deviation. 2. The following numbers represent the weights in pounds of six 7year old children in Mrs. Jones' 2nd grade class....

Lincoln School Mathematics Department IB Math Standard-1 Ms. Fabiola Medrano Name: ______________ Date: May 2, 2013 Total marks: 50 marks Marks obtained: _____ Score: ______ Quiz 4.2 (Descriptive Statistics II) General Instructions: Answer each of the following questions on the space provided. You must show ALL your work and IN PEN to earn full credit. 1. The following table gives the examination grades for 120 students. Grade Cumulative frequency 1 9 9 2...

DESCRIPTIVE STATISTICS & REGRESSION 1. In general, a …………… is a number describing some aspect of a population. a. Sample. b. Parameter. c. Inference. d. Correction factor. 2. a. b. c. d. A sample quantity that serves to estimate an unknown parameter from a population is called: An equivalence. An estimator. An inference. An hypothesis test. 3. A sample may be drawn to: a. Save needless waste of time, money, and effort. b. Discover facts about a population. c. Make inferences about a...

For each item below: Identify the type of data (quantitative - discrete, quantitative - continuous, or qualitative) that would be used to describe a response. Give an example of the data. • Quantitative – Discrete: Data obtained that are discrete numbers. e.g. 1, 2, 3... • Quantitative – Continuous: Data from a population that is assumed to be measured accurately. • Qualitative : Categorization or description attributes of a population. e.g. red, blue,etc • Number of tickets sold to...

Master of Business Administration-MBA Semester 1 MB0038 – Management Process and Organization Behavior - 4 Credits (Book ID: B1127) Assignment Set- 1 (60 Marks) Note: Each question carries 10 Marks. Answer all the questions. Q.1 Write a note on the managerial roles and skills. [10] [10] Q.2 Explain the social learning theory in detail. [10] [10] Q.3 Explain the Big 5 model of personality. [10] Q.4 What are the different factors influencing perception? [10] [10] Q.5 Write a note on...

Guessing the Bounce Plate Affect Abstract The goal behind this experiment was to estimate the distance a ball would travel after it falls a certain distance and bounces off a metal plate which has an angle of 45 degrees. To find this we had to take the basic equations for kinematics which are (1/2)at2=x and v=v0+at and combine them to make an equation that will help us solve for the distance the ball will travel after hitting the bounce plate. The equation came out to be...

Week Five Discussion | This Discussion will give you the opportunity to calculate or identify the three measures of central tendency. You will be asked to select an appropriate real life situation in which one measure would be more appropriate than the other two measures of center. 1. Select a topic of interest to you and record the topic in your posting, for example: “What is the average number of hours people watch TV every week?” Make sure the question you ask will be answered with a...

FOR SOLVED ASSIGNMENTS VISIT WWW.SMUSOLVEDASSIGNMENTS.COM OR EMAIL- solvemyassignments@gmail.com DRIVE PROGRAM SEMESTER SUBJECT CODE & NAME BK ID CREDITS MARKS FOR SOLVED ASSIGNMENTS VISIT WWW.SMUSOLVEDASSIGNMENTS.COM OR EMAIL- solvemyassignments@gmail.com ASSIGNMENT SUMMER 2015 MBA/ MBADS/ MBAFLEX/ MBAHCSN3/ PGDBAN2 I MB0040 STATISTICS FOR MANAGEMENT B1731 4 60 Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is...

Chapter 3, Problem 3 Using published sources (for example, The Wall Street Journal, Barron's, Federal Reserve Bulletin), look up the exchange rate for U. S. dollars with Japanese yen for each of the past 10 years (you can use an average for the year or a specific time period each year). Japanese Yen to U. S. Dollar (Retrieved from http://research.stlouisfed.org/fred2/data/EXJPUS.txt ) Date Example - Japan Stock Price in Yen Example -...

HONORS STATISTICS CH1 In an observational study, researchers simply observe characteristics and take measurements, as in a sample survey. In a designed experiment, researchers impose treatments and controls and then observe characteristics and take measurements. Data from a sample of citizens of a certain country yielded the following estimates of average TV viewing time per month for all the citizens. Answer: Inferential, because the statistics are used to make inference about...

1 “Arithmetic vs. Geometric Means: Empirical Evidence and Theoretical Issues” by Jay B. Abrams, ASA, CPA, MBA Copyright 1996 There has been a flurry of articles about the relative merits of using the arithmetic mean (AM) versus the geometric mean (GM). The Ibbotson SBBI Yearbook took the first position that the arithmetic mean is the correct mean to use in valuation. Allyn Joyce’s June 1995 BVR article initiated arguments for the GM as the correct mean. The previous articles have...

Matched T-test (four steps of NHT) Step 1 Scientific (just the written portion) Null (no effect) Alternative (there is an effect) Step 2 Rather than finding standard error we look for standard deviation first. Standard error has a parallel formula to SD. Smd = SD/ sqrt n. Step 3 Set Alpha to .05 two tailed Critical value of t. (t table) Decision rules, either sketch or write out. Step 4 Conclusion Mean of difference scores T-statistic takes the same basic form (statistic...

Sample 9.23 A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labeled as 8 ounces, the company wants the packages to contain a mean of 8.17 ounces so that virtually none of the packages contain less than 8 ounces. A sample of 50 packages is selected periodically, and the packaging process is stopped if there is evidence that the mean amount packaged is different from 8.17 ounces. Suppose that in a particular of...

Geometric mean From Wikipedia, the free encyclopedia Jump to: navigation, search The geometric mean, in mathematics, is a type of mean or average, which indicates the central tendency or typical value of a set of numbers. It is similar to the arithmetic mean, which is what most people think of with the word "average," except that instead of adding the set of numbers and then dividing the sum by the count of numbers in the set, n, the numbers are multiplied and then the nth root of the...

1.Mean and median are used as the primary measurement. Mode is seen in the first table and table 3 Appropriate measure of central tendency? Absolutely, the mean is clearly stated and many variations are introduced. Comparisons between years are used to show increases or decreases within the infant mortality rate. 2. How were measures of variation used in the study? Amongst the data collected several variations were introduced. These variations within cultures including Whites,...

CHAPTER I INTRODUCTION BACKGROUND OF THE STUDY According to the Webster’s dictionary, Gadgets are electronically simplified applications that make work easy. They play a major role within the common man’s life and now people have grown so used to it that it becomes very difficult for them to think about way of life chores within the absence of gadgets. Starting from a showering machine, a chimney or an electrical hub, the churner or just the TV set; gadgets have invaded every a part of our...

Measures of Location The average is also referred to as the arithmetic mean or simply the mean. The mean is a measure of the center of the data. Average and mean are used interchangeably to label the result of the sum of all measurements divided by the number of measurements. In mathematical notation the formula for calculating the sample mean is given below. If the value given represents the mean of all values in a population it is denoted . When the data are from a sample, the...

“The end does not justify the mean " What does it really mean ...??? How you go about doing something is as important as what you end up doing. If you use illegal mean to accomplish a legal and even desirable result, the good result does not make the bad means you used justifiable. "The ends don't justify the means" is the classical saying, and there is a lot of philosophical debate about how far this can go. The current debate is whether it is okay to torture somebody if you end up saving...

Estimating a Population Mean A common problem in statistics is to obtain information about the mean, μ, of a population. For example, we might want to know • The mean age of people in the civilian labor force, • The mean cost of a wedding, • The mean gas mileage of a new-model car, or • The mean starting salary of liberal-arts graduates. If the population is small, we can ordinarily determine μ exactly by first taking a census and then computing μ from the population data. If the...

Mean, Mode and Median Ungrouped and Grouped Data Ungrouped Data refers to raw data that has been ‘processed’; so as to determine frequencies. The data, along with the frequencies, are presented individually. Grouped Data refers to values that have been analysed and arranged into groups called ‘class’. The classes are based on intervals – the range of values – being used. It is from these classes, are upper and lower class boundaries found. Mean Mean The  ‘Mean’ is the total of all the...

Air Force Assignment 1. Use appropriate descriptive statistics to summarize the training time data for each method. What similarities or differences do you observe from the sample data? Descriptive analysis in excel has been used to come up with relevant figures of the given data samples which is tabulated below: Descriptive Statistics | Current | Proposed | Mean | 75.06557 | 75.42623 | Standard Error | 0.505094 | 0.32091 | Median | 76 | 76 | Mode | 76 | 76 | Standard Deviation...

Mean and Standard Deviation The mean, indicated by μ (a lower case Greek mu), is the statistician's jargon for the average value of a signal. It is found just as you would expect: add all of the samples together, and divide by N. It looks like this in mathematical form: In words, sum the values in the signal, xi, by letting the index, i, run from 0 to N-1. Then finish the calculation by dividing the sum by N. This is identical to the equation: μ =(x0 + x1 + x2 + ... + xN-1)/N. If you are...

Mean, Median, Mode, and Range Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but these are, I think, the three most common, and are certainly the three you are most likely to encounter in your pre-statistics courses, if the topic comes up at all. The "mean" is the "average" you are used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers. To find the median,...

Mean, Mode and Median Ungrouped and Grouped Data Ungrouped Data refers to raw data that has been ‘processed’; so as to determine frequencies. The data, along with the frequencies, are presented individually. Grouped Data refers to values that have been analysed and arranged into groups called ‘class’. The classes are based on intervals – the range of values – being used. It is from these classes, are upper and lower class boundaries found. Mean Mean The  ‘Mean’ is the total of all the...

2a) a) Increasing the difference between the sample mean and the original. The z score represents the distance of each X or score from the mean. If the distance between the sample mean and the population mean the z score will increase. b) Increasing the population standard deviation. The standard deviation is the factor that is used to divide by in the equation. the bigger the SD, then the smaller the z score. c) Increasing the number of scores in the sample. Should bring the samples...

Statistics Course Project Part 1 Student: Zissis Koukoutaris Course : Statistics Professor: Dimitrios Fotiadis Semester: Fall-2012 Introduction This report is written by Koukoutaris Zissis a student from Northeastern University. Mr Fotiadis my professor of the MGSC 23021 assigned me the task. 1. Use methods of descriptive statistics to summarize the data. Comment on the findings 2. Develop estimated regression equations, first using annual income as the independent...

Mean, median, and mode are differing values that furnish information regarding a set of observations. The mean is used when one desires to determine the average value for data ranked in intervals. The median is used to learn the middle of graded information, and the mode is used to summarize non-numeric data. The mean is equal to the amount of all the data in a set divided by the number of values in that set. It is typically used with continuous figures. The result will probably not be one of...

PROBABILITY AND STATISTICS Lab, Seminar, Lecture 4. Behavior of the sample average X-bar  The topic of 4th seminar&lab is the average of the population that has a certain characteristic.  This average is the population parameter of interest, denoted by the greek letter mu.  We estimate this parameter with the statistic x-bar, the average in the sample. Probability and statistics - Karol Flisikowski X-bar Definition 1 x   xi n i 1 Probability and statistics - Karol...

Memorandum Subject: Regression to the Mean with Coin Flips This paper discusses the statistics project, Regression to the Mean with Coin Flips. The paper is divided into four parts, which are summarized below: Part One: The Questionnaires This section summarizes the results of questionnaires handed out to a random sample of 110 people. Pie charts are provided, which reflect the responses to each question. Part Two: 200 Flips This section discusses the outcome of flipping a normal...

Chapter 1 THE PROBLEM AND ITS BACKGROUND Introduction <macro level concept> (Sample) Computer is traced as a product from the ancient times of computing devices that have been developed through the hands of generations’ pillars. Many did predict the transformation of computer in terms of appearance and potential uses, but no one wonder the phenomenal domination of computer in almost all arenas of man’s life as seen today. The birth of computer paved a way on the present mobility of...

Comparisons Involving Means Learning Objectives 1. Be able to develop interval estimates and conduct hypothesis tests about the difference between two population means when EMBED Equation.DSMT4 and EMBED Equation.DSMT4 are known. 2. Know the properties of the sampling distribution of EMBED Equation . 3. Be able to use the t distribution to conduct statistical inferences about the difference between two population means when EMBED Equation.DSMT4 and EMBED Equation.DSMT4 are unknown. 4....

Achieve mean hard work All the people has been trying to find an easy method for achieving, but not too many are they who understand that all the success comes after years and years of work. But sometimes, something for which you had worked a lot, could not be how you expected. In these situations you don’t need to be disappointed and try to find where you mistook. Firstly, if you've got a goal that you're striving to achieve, be absolutely prepared to work hard. That being said, it's...

1 Chapter 7 Comparing Means in SPSS (t-Tests) This section covers procedures for testing the differences between two means using the SPSS Compare Means analyses. Specifically, we demonstrate procedures for running Dependent-Sample (or One-Sample) t-tests, Independent-Sample t-tests, Difference-Sample (or Matched- or Paired-Sample) t-tests. Unfortunately, SPSS does not provide procedures for running Z-tests. For the following examples, we have created a data set based on cartoon 9.1 (Cow...

Mean, Median, Mode, and Range Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but these are, I think, the three most common, and are certainly the three you are most likely to encounter in your pre-statistics courses, if the topic comes up at all. The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers. To find the median,...

Standard Deviation in the Business World Joint optimization of mean and standard deviation using response surface methods The importance of statistical information cannot be stressed enough in the business world, but even with our advanced computing systems, information can be entered wrong, or the deviation to large or small. The purpose of this article is to investigate the potential, and problems, with the dual response system (DRS), response surface methodology (RSM), and robust parameter...

Name : E. Student ID : 2011 Country : Course : Business Statistics Homework 2 1. Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25. a) Compute the mean, median, and mode. b) Compute the 20th, 65th, and 75th percentiles. c) Compute the range, interquartile range, variance, and standard deviation. Answers: Data values: 15, 20, 25, 25, 27, 28, 30, 34 a) Mean: [pic]= ∑xi/n = (15+20+25+25+27+28+30+34) / 8 = 204 / 8 = 25.5...

Please refer to Statistics for Behavioral Science by Robert Pagano in answering the following problems: | | | | | | | | | | | | | | | | | | | | | | I. Calculate the mean, median, and mode for the following scores: | | | | | | | | | | A. 5,2,8,2,3,2,4,0,6Mean: 3.56Median: 3 Mode: 2 | | | | | | | | | | | | | | | B. 30, 20, 17, 12, 30, 30, 14, 19Mean: 21.5 Median: 19.5Mode: 30 | | | | | | | | | | | | | C. 1.5, 4.5, 3.2,...

Chapter 10 Statistical Inference About Means and Proportions with Two Populations Case Problem: Par, Inc. This case can provide discussion and differing opinions as to what hypothesis test should be conducted. Students should begin to see that logical arguments exist for structuring the hypotheses differently. In some interpretations of the problem, a two - tailed test can...

 Forecasting HSM/260 January 17, 2014 Janice Gilstorff Forecasting Exercise 9.1 Forecasting is a guess of what the financial future holds (production output or sales). In the scenario in the book exercise 9.1 they want you to forecast what the 20X5 figures would be. It does give you some background information, such as the Human services expenses over the past four years. 20X1 [$5,250,000] 20X2 [$5,500,000] 20X3 [$6,000,000] 20X4...

Here, we describe estimation and hypothesis-testing procedures for the difference between two population means when the samples are dependent. In a case of two dependent samples, two data values—one for each sample—are collected from the same source (or element) and, hence, these are also called paired or matched samples. For example, we may want to make inferences about the mean weight loss for members of a health club after they have gone through an exercise program for a certain period of...

Hypothesis Testing: Two-Sample Case for the Mean Many cases in the social sciences involve a hypothesis about the difference between two groups (i.e. men and women, control and experiment). We analyze statistics from two samples, and the hypothesis and confidence interval would deal with the difference between two population means. The following factors are important in hypothesis testing: 1. probability theory 2. the sampling distribution of the statistic 3. the errors...

T-test A t-test is a hypothesis test in which the test statistic follows a Student’s t-distribution under the null hypothesis. There are several different test statistics that fall into the category of a t-test. One-Sample t-test x  0 s n df  n  1 t Independent Two-Sample t-test t x1  x2 2 sx1x2 n  1 2 2 sx1  sx2 2 df  2n  2 sx1x2   Unequal Sample Size Two-Sample t-test t x1  x2 1 1 sx1x2  n1 n2 sx1x2   n1  1 sx2   n2...

The question stated that when a Trial Balance balances, it means the accounts are free of errors. I disagree with the statement. There may still be errors even if the trial balance is balances. There are six types of errors. The first type of error is the “error of omission” and the word omission mean left out. Its mean that a transaction is not recorded in the books of original entry, which mean both the debit and credit effects of the transaction are not shown in the Trial Balance. For...

Introduction and Problem Statement:- A liberal Arts University in the Midwest, the Harrigan University wants the best quality students to enrol in their University, especially from its region of the country. The selection procedure at Harrigan is based on certain criteria, namely, the number of high school clubs the applicant has served as an officer in, number of varsity letters that the applicant has earned, the applicant’s high school GPA and the applicant’s combined SAT score, apart from...

T-test for Two Independent Samples * This test is used when only two unrelated groups are being compared and the measurements are either interval or ratio. The two groups may or may not have the same number of samples. * The t-test for two independent groups involves testing whether or not there is a significant difference between the population means of the two groups. Consider a study wherein the effectiveness of banana leaves as an organic wrapper was compared to that of aluminum...

Additional exercise Last month, Yasmin counted the number of cats and the number of dogs she met during her daily walk in the park. Cats: 1 5 2 3 8 9 2 5 1 7 3 3 6 8 2 4 8 4 6 1 4 7 3 2 8 9 4 4 6 2 1 Dogs: 4 8 9 5 5 7 3 7 2 8 9 6 6 8 3 3 5 6 8 3 4 2 6 7 9 1 4 2 5 5 7 Using the data gathered on cats: a) Put these 31 observations into an absolute frequency table. b) Calculate the minimum, Q1, the median, Q3 and the maximum (the so-called five core values). c) Calculate the range....

TEMASEK POLYTECHNIC SCHOOL OF INFORMATICS & IT Quantitative Techniques Lab 5 (Topic 3: Hypothesis Testing) ------------------------------------------------- Procedure for Hypothesis Testing Step 1: Formulate the null and alternative hypothesis. Draw the one-tail or two- tail test diagram. Step 2: Specify the level of significance. Determine the critical value (s). Step 3: Identify the test statistics to be used and calculate it. Step 4: Draw the conclusion. Formulae...

Exam Name: Keri Ronaldson__________________ Class: _Statistics________________ Date: 10-30-2014___________________________________________ □ EXERCISE 11 Questions to be graded 1. What demographic variables were measured at least at the interval level of measurement? The length of labor in hours and the number of hours working per week, age, income, return to work. 2. What statistics were used to describe the length of labor in this study? Were these appropriate? The mean which would be the...

Individual solid particles are characterised by their size, shape, and density. 1.1 Particle shape The shape of an individual particle is expressed in terms of the sphericity F s, which is independent of particle size. The sphericity of a particle is the ratio of the surface-volume ratio of a sphere with equal volume as the particle and the surface-volume ratio of the particle. For a spherical particle of diameter D p, F s =1; for a non-spherical particle, the sphericity is defined as...

Data Log(Attendance) = B1wins + B2FCI + B3tktprice + B4payroll + B5state + B6earnspop In order to explain the effect that winnings percentage has on attendance, I have created an adjusted economic model that I have specified above. In order to test my economic model, I have compiled data for each of the variables specified in the model from the years 2003 to 2005. The question that I will be answering in my regression analysis is whether or not wins have an affect on attendance in...

1 A stream has been monitored weekly for a number of years, and the total dissolved solids in the stream averages 40 parts per million and is constant throughout the year. Following a recent change in land use in the drainage basis of the steam, a fluvial geomorphologist finds that the mean parts per million of dissolved solids in a 25-week sample to be 52 with a standard deviation of 32. Has there been a change in the average level of dissolved solids in this stream? 2 An exhaustive...

The Changes of Heart Rate of Students during Human Dive Response when Resting and Submerged Abstract The dive response is known more popularly as a mammalian dive reflex. It is a survival mechanism built into mammal’s bodies, essentially. Over the years, scientists have been determined to find what triggers mammals to have a decreased heart rate when submerged under water allowing them to stay under the water longer when they do not typically live under water. In this experiment, we...

STATISTIC (1) A study of the number of cars sold looked at the number of cars sold at 500 Dealers The smallest dealer had 11 cars sold and the largest had 154 cars sold. If you were going to create a frequency distribution of the number of cars sold using six classes in your frequency distribution, which of the following might be a reasonable first class? (a) 0 to 25...

Chapter 1 THE PROBLEM AND ITS BACKGROUND Introduction The globalization trend in the 21st century is to effectively and efficiently spawn the delivery of educational services to generate progress in the attainment of quality life for all. More than ever, state leaders strive to invest in quality education as a niche for their nations to develop their people into world class citizens in asserting their future and destiny so in the end they have the active share in building a better world...

TCMG524 Ran Wang 0786512 2/12/2014 Chapter 3 1. The content of liquid detergent bottles is being analyzed, Twelve bottles, randomly selected from the process, are measured, and the results are as follows (in fluid ounces): 16.05, 16.03, 16.02, 16.04, 16.05, 16.01, 16.02, 16.02, 16.03, 16.01, 16.00, 16.07 (a) Calculate the sample average. (16.05+16.03+16.02+16.04+16.05+16.01+16.02+16.02+16.03+16.01+16+16.07)/12=16.03 (b) Calculate the sample standard deviation. =0.0193 3.2. The bore diameters...

One- and Two-Sample Tests of Hypothesis, Variance, and Chi-squared Analysis Problem Sets University of Phoenix Applied Business Research and Statistics QNT 561 August 5, 2011 Chapter 10 Exercise Question 31: A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on the average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean...

Introduction to Use of statistics in daily life:- Statistics deal with frequency distribution. It is used to compare twoor more frequency distribution taken from different population to see if there are any differences between them. The statistics uses the following measures for the comparisson. They are mean, median and mode. Mean is the average of all the observations. Median is the middle most value of the observations and mode has the maximum frequencies. Let us see the use of...

Please submit your HW (Hardcopy) at the end of lecture OR to my office (L214) QMDS 400 Project and Quality Management HW#2 DUE 6:00pm 18 Nov 2014 Name:_______________________ Student ID:___________________ Note: Late submission will NOT be accepted! PROBLEMS P1. After a number of complaints about its directory assistance, a telephone company examined samples of calls to determine the frequency of wrong numbers given to callers. Each sample consisted of 100 calls. The results to date are...

Shows the values that a variable can take and the number of observations associated with each value b. Expresses the arithmetic average of a frequency distribution c. Indicates the typical value of a frequency distribution d. Represents the midpoint of a frequency distribution e. Comparing quantities where x and y are completely independent of each other or x can be included in y f. Represents the simplest measure of spread (or variability) g. Indicates the most frequent observation in a...

Case Manzana Insurance: Fruitvale Branch Manzana Insurance is one of the largest property-liability insurers in California (USA). Fruitvale is one of Manzana’s smaller branches, with three underwriting teams supporting 76 agents in three geographical territories. Fruitvale is at this moment facing deteriorating profits due to operational problems. The effect of these operational problems is (particularly in comparison with competing insurers like Golden Gate) a high Turnaround Time (TAT),...

Case #9 1. Is it proper to multiply the average order size, $42.33, by the number of addresses (1,300,000) in the target mailing? a. No, there is far too much variability in responses, including a massive outlier, to have any confidence in this average. The response rate is very low, one would be concerned as to why the rate of response was only 9.2%. The question would therefore be whether the remaining 90.8% will follow the same pattern or will they buy anything at all. There is...

/ t The following data indicate the weight of 40 cultured tiger prawn (in gm) at the end of months in a pond. 3 25 55 46 50 30 t2 20 30 59 15 75 28 13 65 66 43 57 25 33 57 23 14 22 45 20 2s 20 35 19 22 40 t4 28 15 61 38 19 70 13 22 Weight of cultured tiger prawn i. ii. ( Z. ' Construct a stem-and-leaf display for the data given using the ten digit as the stem. What can you say about the distribution of the weights of tiger prawn. Construct a frequency distribution for the...

MODEL CREATION Introduction The main purpose of using financial model is to analyse and understand the financial situation of business for decision-making. .Finance needs various calculations to get precise information. There are different types of user e.g. managers and owners need the financial model to evaluate the risk and return to make business decisions for the smooth operation, Individual investors make logical investment decisions – ‘’Risk aversion’’ and etc.(Wild, Subramanyam and...

Single Investment. Expected return is a tool used to determine whether or not an investment has a positive or negative average net outcome. The most highest expected return is from Yong Tai Berhad. Standard deviation is a quantity expressing by how much the members of a group differ from the mean value for the group. The lowest standard deviation among this three company is from Hiap Teck Venture. Coefficient of variation represents the ratio of the standard deviation to the mean,...

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Use the given degree of confidence and sample data to construct a confidence interval for the population proportion. 1) Of 346 items tested, 12 are found to be defective. Construct a 98% confidence interval for the percentage of all such items that are defective. A) (3.34%, 3.59%) B) (1.18%, 5.76%) C) (1.85%, 5.09%) D) (0.93%, 6.00%) E) (0.13%,...

Inferential Statistics Making statements about a population by examining sample results Sample statistics (known) Population parameters Inference (unknown, but can be estimated from sample evidence Sample Population Sample Statistics as Estimators of Population Parameters A sample statistic is a numerical measure of a summary characteristic of a sample. • • • A population parameter is a numerical measure of a summary characteristic of a population. An...

TUTORIAL 1 -95253936900 Each of the following processes involves sampling from a population. Define the population, and state whether it is tangible or conceptual. A shipment of bolts is received from a vendor. To check whether the shipment is acceptable with regard to shear strength, an engineer reaches into the container and selects 10 bolts, one by one to test. The resistance of a certain resistor is measured 5 times with the same ohmmeter 8 welds are made with the same process, and...

JABATAN PENDIDIKAN WILAYAH PERSEKUTUAN KUALA LUMPUR KEMENTERIAN PELAJARAN MALAYSIA ADDITIONAL MATHEMATICS PAPERWORK 2015 The survey of household spending (HES) conducted for the first time in 1957/58. Beginning in 1993/94 survey has been conducted every five years and the most recent studies was conducted in 2009/2010. The survey was made against private households in urban and rural areas. The main objective of HES is to collect information on the level and pattern of consumption expenditure...

Name: Suma Pole Class: 362V (Work book Exercises 11 and 16) 06/12/15 Exercise 11: Using Statistics to Describe a Study sample. 1. What demographic variables were measured at the interval level of measurements? Age, Income, Length of labor, Return to work and number of hours working per week. 2. What statistics were used to describe the length of labor in this study? Mean and standard deviation were used to describe the length of labor. These were appropriate since mean and standard deviation...

NAME: Class: CONTENT Acknowledgement Objectives Introduction Task Specification Problem Solving Further Exploration Reflection ACKNOWLEDGEMENT First of all, I would like to say Alhamdulillah, for giving me the strength and health to do this project work and finish it on time. Not forgotten to my parents for providing everything, such as money, to buy anything that are related to this project work, their advise, which is the most needed for this project and facilities such as...

Standard Level Biology Design Lab: How do Smarties and M&Ms compare when examined in 5 areas: mass, shell solubility, volume, density, and nutrition facts? , Erin MacNeil SL Biology Kathy DeGrasse Halifax Grammar School March 3rd, 2013 Section 1.1 Planning (a) * Introduction * Research Question * Hypothesis * Explanation of Hypothesis * Variables Introduction: In this lab, M&Ms and Smarties will be compared in five different ways: mass, shell...

CHAPTER I Background of the Study 1.1 Introduction The Philippines was under the Spanish ruling for 377 years. The influences of the Spanish upon the natives during this extensive period were profound. Every aspect of their government, culture, education, economy and religion revolutionize irrevocably. This research would seemingly try to have a clear view on the perceptions of the UBLC students on the influence of Spanish Colonization in the Country. The findings of this study will help...

1. Calculating Returns ( LO1, CFA1) Suppose you bought 100 shares of stock at an initial price of $ 37 per share. The stock paid a dividend of $ 0.28 per share during the following year, and the share price at the end of the year was $ 41. Compute your total dollar return on this investment. Does your answer change if you keep the stock instead of selling it? Why or why not? 2. Calculating Yields ( LO1, CFA1) In the previous problem, what is the capital gains yield? The dividend yield? What...

TOPIC 1 USE THE FOLLOWING INFORMATION FOR THE NEXT TWO PROBLEMS Assume you bought 100 shares of NewTech common stock on January 15, 2003 at $50.00 per share and sold it on January 15, 2004 for $40.00 per share. 1 What was your holding period return? 2 What was your holding period yield? USE THE FOLLOWING INFORMATION OR THE NEXT TWO PROBLEMS Suppose you bought a GM corporate bond on January 25, 2001 for $750, on January 25, 2004 sold it for $650.00. 3 What was your annual holding...

Social Influence on memory of Sydney Olympic 2000 Abstract Our decision-making might change as a consequence of interacting with a single individual or a group of people. We tend to have same opinion with others when we are in a group. An experiment about the effect of social influence was conducted. 563 participants were asked to recall how many medals Australia got in Sydney Olympics 2000. Participants were given ¡¥Low¡¦ (50%), ¡¥Accurate¡¦ or ¡¥High¡¦ (150%) examples. Result shows that...

 Top of Form Grading Summary These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 6/11/2012 Time Spent: 01 min , 13 secs Points Received: 21 / 60 (35%) Question Type: # Of Questions: # Correct: Multiple Choice 13 9 Short 5 N/A Grade Details Page: 1 2 1. Question : (TCO 11) Define point estimate. Student Answer: Approximation of a single quantity or a single...

Movie Case Study This case study is comprised of a sample of one hundred movies with the following four variables: opening gross sales, total gross sales, number of theaters, and weeks in top 60. The four variables are used to analyze the motion picture industry, and show the descriptive statistic of the variables and to analyze the results. The results will show the high performance outliers of the motion picture industry and why. The correlation between total gross sales and each variable...

Joey Stevens QMM 240 TR 10:00-11:15 Computer Assignment #1 1. a. Excel Histograms Bins MPG | Frequency | 11 | 1 | 16 | 3 | 21 | 16 | 26 | 34 | 31 | 13 | 36 | 9 | 41 | 2 | 46 | 2 | Bins Weight | Frequency | 1300 | 1 | 1780 | 7 | 2260 | 18 | 2740 | 12 | 3220 | 22 | 3700 | 11 | 4180 | 7 | 4660 | 2 | b. I chose the number of classes based on the Sturges’ Rule table. I knew I had 80 observations so that put me between either 7 or...

“Exercise 11 - Using Statistics to Describe a Study Sample” “Name:” _Kris Bailey______________________________ “1. What demographic variables were measured at least at the interval level of measurement?” “2. What statistics were used to describe the length of labor in this study? Were these appropriate?” “3. What other statistic could have been used to describe the length of labor? Provide a rationale for your answer.” “4. Were the distributions of...

Michael Williamson Professor Preasmyer Persuasive Writing 24 October 2014 Reflection Paper: Sleep Questionnaire My survey had eight questions that pertained to sleep. The results I gathered gave me answers to the average night’s sleep on a week day, the importance of sleep to people, if people feel they are getting enough sleep, and the factors that prevent sleep. When I first created the survey, I expected the answers to reflect that most people sleep a healthy amount of time (despite busy...

A Synopsis of How to Lie with Statistics by Darrell Huff When most people hear or read a statistic, they quickly have to decide if the numbers listed are valid or invalid. It is usually assumed that the author of the statistic is knowledgeable in the field to which the statistic pertains. However, on many occasions, the statistic is false, due to the author’s wording. Darrell Huff’s novel How to Lie with Statistics is a manual that can help individuals catch these lies. The novel allows...

Module 1- Exercise 16 1. The researchers analyzed the data they collected as though it were at what level of measurement? c. Interval/ratio 2. What was the mean posttest empowerment score for the control group? 97.12 3. Compare the mean baseline and posttest depression scores of the experimental group. Was this an expected finding? Provide a rationale for your answer. The experimental group had a mean baseline Depression score of 14.00 and posttest depression score...

Chapter 11 Questions to be graded: 5. Were the experimental and control groups similar in their type of feeding? Provide a rationale for your answer. Answer: Yes the experimental and control groups are similar in their feeding type because 40.6% in the experimental group decided to breast-feed, and 41.7% in the control group decided to breast-feed, that's only 1.1% difference. 53.1% of the experimental group bottle-fed while 50.0% of the control group bottle-fed, a small 3.1% difference....

Case Closed: Nielson Ratings 1.The graph indicates that ABC has the highest ratings, with an average of 8.72million viewers. CBS has 7.98million viewers on average, and NBC has the least with an average of 6.88million viewers. 2. ABC= 5.5, 5.7, 7.6, 9.7, 16.2 CBS= 5.4, 6.1, 8, 9.65, 10.9 NBC= 5.4, 5.95, 7.1, 7.7, 7.8 3. - ABC IQR= 9.7-5.7=4 Upper= 9.7+1.5(4)= 15.7 Lower= 5.7-1.5(4)= -.3 1 outlier= 16.2 - CBS IQR= 9.65-6.1= 3.55 Upper= 9.65+1.5(3.55)= 14.98 Lower=...

ST102 Exercise 1 (2014–15) Practicalities: Your class teacher will explain to you the dates when solutions to future exercises should be handed in, and when they will be marked and returned to you, during your first class. You should spend a reasonable amount of time on each set of exercises. Do not worry if you have been unable to complete all questions, as long as you have done your best. Exercise 1 does not need to be submitted. It covers aspects of decriptive statistics, which many of you...

Review Questions for the Midterm Exam Part I. All the Homeworks and Quizzes (50% of the Midterm Exam) Part II. Additional Review Questions 1. Which of the following statements is correct? a) The range is a measure of central tendency. b) The median is a measure of dispersion. c) For a symmetric distribution, the mean is equal to the median. d) For a skewed distribution, the variance is a negative number. e) The variance is a measure of central tendency. 2....

Assignment on Central Tendency and Dispersion 1. A manufacturer of hand shovels is deciding what length handles to use. Studies of user preference reveal that the average, the median, mean and mode of preferred length are all different. What are the implications of using each of these values? Which value would you decide? 2. A given machine is assumed to depreciate 40 percent in value in the first year, 25 percent in value in the 2nd year and 10 percent in value in the next three years;...

Anatomical Determinants of Procambarus clarkii success in agnostic behavior Introduction Access to resources is important for animal survival and where there is competition...

1 Examination-2014 Quantitative Techniques QUIZ TEST (Answer All Questions) Time – 20 mins Full Marks – 10 (10 x 1) 1. The GM of a set of five numbers is 2. The GM of a set of four numbers is 4. What is the GM of the numbers if both the sets considered together? 2. What do you mean by bi-modal incase of measures of central tendency? 3. If mean and SD are 50 and 10 then what is the value of Coefficient of Variation. 4. What is the empirical relationship between Mean, Median and...

One sample tests of hypotheses 1. An automobile manufacturer claims that a particular model gets 28 miles to the gallon. The Environmental Protection Agency, using a sample of 49 automobiles of this model, finds the sample mean to be 26.8 miles per gallon. From previous studies, the population standard deviation is known to be 5 miles per gallon. Could we reasonably expect that we could select such a sample if indeed the population mean is actually 28 miles per gallon? 2. Computing World has...