Statistics for Management and Economics (Book Only)
11th Edition
ISBN: 9781337296946
Author: Gerald Keller
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 2.3, Problem 51E
To determine
Determine the result of three political groups.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The Chi-Squared Test - X²
Choco-Zuties, and the other ad was for a new healthy snack called Apple-Zuties.
Product advertisers studied the effects of television ads on children's choices for two new snacks. The
advertisers used two 30-second television ads in an experiment. One ad was for a new sugary snack called
program, the children were offered a choice between the two snacks. The table below summarizes their choices.
individually watched a 30-minute television program that was interrupted for 5 minutes of advertising. After the
For the experiment, 75 children were randomly assigned to one of three groups, A, B, or C. Each child
Number Who Chose
Choco-Zuties
21
13
22
Group
A
B
с
Kristin Trehame
11-30-20
Chapter 11
Analyzing the Association Between Categorical Variables
Type of Ad
Choco-Zuties only
Apple-Zuties only
Neither
Number Who Chose
Apple-Zuties
4
12
x²=(obs-exp)²
exp
Do the data provide convincing statistical evidence that there is an association between type of ad and…
2. Based on past records, it is generally believed that on an average, a typical University of Technology and Applied Sciences, Nizwa student spends about 25 hours in the LRC per week. Recently, the library has been shifted to a new location which is further away from the academic block. As a result, the administration feels that students may be spending less time in the library. Accordingly a random sample of 41 students were selected and the average number of hours they spend in the library came out to be 16.78 with a standard deviation of 5.17. Carry out an appropriate test of hypotheses for the above problem to test whether the shifting of the library has adversely impacted the study time in the population of all students. (You may assume that study times/week approximately follow a normal distribution in the population).
A company launched a sales campaign and appointed 110 salesmen for this purpose. At
the end of the period the sales results were analysed and the following information was obtained.
Sales ('000
Number of Salesmen
Sales ('000-
Number of Salesmen
4
50-55
55-60
75-80
18
7
80-85
12
60-65
10
85-90
10
65-70
20
90 and above
5
70-75
22
It was decided to group the salesm
into three categories: (i) Those
whose sales were less than dollar
68,000, (ii) those whose sales were
more than Dollar 68,000, but less t
han dollar 86,000, and (iii) those w
hose sales exceeded Dollar 86,000.
The salesmen in the first category
were to be given further training an
d those in the third category to be
given efficiency bonus of 2% of thei
r sales. Find how many will be train
and how much bonus will be pai
d ? State the assumptions, if any.
Chapter 2 Solutions
Statistics for Management and Economics (Book Only)
Ch. 2.1 - Prob. 1ECh. 2.1 - Prob. 2ECh. 2.1 - Prob. 3ECh. 2.1 - Prob. 4ECh. 2.1 - Prob. 5ECh. 2.1 - Prob. 6ECh. 2.1 - Prob. 7ECh. 2.1 - Prob. 8ECh. 2.1 - Prob. 9ECh. 2.1 - Prob. 10E
Ch. 2.1 - Prob. 11ECh. 2.1 - Prob. 12ECh. 2.2 - Prob. 13ECh. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - Prob. 16ECh. 2.2 - Prob. 17ECh. 2.2 - Prob. 18ECh. 2.2 - Prob. 19ECh. 2.2 - Prob. 20ECh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.2 - Prob. 25ECh. 2.2 - Prob. 26ECh. 2.2 - Prob. 27ECh. 2.2 - Prob. 28ECh. 2.2 - Prob. 29ECh. 2.2 - Prob. 30ECh. 2.2 - Prob. 31ECh. 2.2 - Prob. 32ECh. 2.2 - Prob. 33ECh. 2.2 - Prob. 34ECh. 2.2 - Prob. 35ECh. 2.2 - Prob. 36ECh. 2.2 - Prob. 37ECh. 2.2 - Prob. 38ECh. 2.2 - Prob. 39ECh. 2.2 - Prob. 40ECh. 2.3 - Prob. 41ECh. 2.3 - Prob. 42ECh. 2.3 - Prob. 43ECh. 2.3 - Prob. 44ECh. 2.3 - Prob. 45ECh. 2.3 - Prob. 46ECh. 2.3 - Prob. 47ECh. 2.3 - Prob. 48ECh. 2.3 - Prob. 49ECh. 2.3 - Prob. 50ECh. 2.3 - Prob. 51ECh. 2.3 - Prob. 52ECh. 2.3 - Prob. 53ECh. 2.3 - Prob. 54ECh. 2 - Prob. 55CECh. 2 - Prob. 56CECh. 2 - Prob. 57CECh. 2 - Prob. 58CECh. 2 - Prob. 59CECh. 2 - Prob. 60CECh. 2 - Prob. 61CECh. 2 - Prob. 62CECh. 2 - Prob. 63CECh. 2 - Prob. 64CECh. 2 - Prob. 65CECh. 2 - Prob. 66CECh. 2 - Prob. 67CECh. 2 - Prob. 68CECh. 2 - Prob. 69CECh. 2 - Prob. 70CECh. 2 - Prob. 71CECh. 2 - Prob. 72CECh. 2 - Prob. 73CECh. 2 - Prob. 74CECh. 2 - Prob. 75CECh. 2 - Prob. 76CECh. 2 - Prob. 77CECh. 2 - Prob. 78CE
Knowledge Booster
Similar questions
- A researcher investigated whether a father's level of optimism was predictive of his son's optimism as a young adult. Twenty (20) fathers and sons who agreed to participate in the study were administered a scale measuring their current level of optimism (the scale ranged from 10 to 50), with higher scores indicating greater optimism.arrow_forward6. Imagine that I wanted to test the proposition that people think older politicians are more trustworthy. I recruited an internet sample of 90 people. Each person was asked to read a short article about a hypothetical political candidate. Random assignment determined whether the subjects were told that candidate was 65 or whether they were told that candidate was 35. After reading the article, all subjects used a 10-point scale to rate the candidate on competence, trustworthiness, and likability. I take the mean values of trustworthiness in each group, perform a difference of means test, and find a test statistic of 1.04. Should I reject the null at the 99% confidence level? Why or why not? What does that mean?arrow_forwardNote: If your answer does not exactly match the correct choice, it is due to rounding of intermediate calculations. To avoid the discrepancy, do your calculations in Excel without rounding. A life insurance company wishes to examine the relationship between the amount of life insurance held by a family and family income. From a random sample of households, the company collected the accompanying data. The data are in units of thousands of dollars. INSUR INCOME 97 38 141 29 y = X = Let INSUR 280 75 %3D INCOME 303 81 453 137 357 77 199 43 251 53 807 184 147 45 272 70 537 128 527 117 245 55 483 116 673 204 194 46 154 51 163 48 2 The denominator of the slope coefficient formula for the estimated regression equation is: 108,450.87 280 69 a 507 140 b 105,805.73 464 136 103,225.10 321 71 d 100,707.41 873 206 476 144 574 111 251 65 497 130 826 171 133 32 259 82 281 73 446 146 332 77 219 48 208 55 180 48 169 42 273 69 502 127 547 126 281 80 428 143 370 77 221 49 214 51arrow_forward
- A manufacturer of cat food was planning to survey households in the US to determine purchasing habits of cat owners. Among the questions to be included are those that relate to Where cat fat is primarily purchased. Whether dry or moist cat food is purchased. The number of cats living in the household. Whether the cat is pedigreed. Describe the population. For each of the four items listed, indicate whether the variable is categorical or numerical.arrow_forwardProduct Quality Value for Money Ease of use 0.8 0.6 0.7 21 0.2 0.5 0.8 3. 0.6 0.3 0.5 4 (Proposed) 0.4 0.7 0.1 Importance weight I 1.6 A company conducted a survey of shoppers to understand customer buying habits and determine the share of shoppers that a new product might attract. The customer rated three existing products and one proposed new product on three dimensions: 1.Quality, 2. Durability, and 3. Ease of use. The results of this survey are shown in the following table. The expected market share for the new proposed product (product number 4) is: (2.0) A. 46.3 В. 25.2 C. 15.1 D. 11.6 20.0 E.arrow_forwardA company is considering an organizational change which entails adopting the use of self-managed work teams which they hope will lead to higher levels of employee satisfaction. In order to assess the attitudes of employees of the company towards this change a sample of 250 employees was selected and asked whether they favor the institution of self-managed teams. Three responses were allowed: favor, neutral or oppose. The observed frequency of the results of the survey are shown below: Opinion Type of Job Favor Neutral Oppose Total Hourly Worker 25 40 35 100 Supervision 45 35 20 100 Manager 20 15 15 50 Total 90 90 70 250 Use this data to test the hypothesis that opinion and type of job are independent at the .025 level.arrow_forward
- Researchers conducted an observational study of automobile drivers and their cell phone use by manually observing traffic in heavily congested areas. They would record the amount of time they observed individual drivers on the phone while operating their vehicle in stop and go traffic and the number of accidents on a particular section of highway over the course of a month. The accompanying graph depict the data they recorded, each point represents a 1 mile section of heavily congested roads. From the data, which of these is a potentially valid conclusion? Cell-phone use while driving increases the rate of accidents. O Car accidents and cell-phone use have no relationship. The increasing rate of car accidents causes increased phone-call length. A conclusion cannot be made; the data ignores the omitted variable of which cell-phone provider each person uses. If the x and y variables were swapped, what would the new slope be? zero positive Number of car accidents 10- 9- 8- 7- 5- 4- 3- 2-…arrow_forward“Business Ethics is the application of ethical and moral principles or in a business environment. It deals with what is right and what wrong while doing business”. But to the contrary, evidences show that some business organizations are involved in different unethical practices to increase their profit at the risk of many people’s money, health and lives. As a business ethics student you are required to address the following questions: Describe five unethical practices adopted by business organizations in Oman. You may find it form newspapers, magazines etc. or from your own experiences and observation if any. And Analyze each of these unethical practices and explain how these unethical practices affect the people and society as a whole. And Suggest the ways to overcome each of these unethical practices.arrow_forwardYou must identify the relationship between housing price and size. In this experiment, you have collected data from four major cities, namely Birmingham, Manchester, Bristol and Glasgow. What method is suitable for studying this project? Give an explanation.arrow_forward
- OA large city hospital conducted a study to investigate the relationship between the number of unauthorized days that employees are absent per year and the distance (miles) between home and work for the employees. A sample of 10 employees was selected and the following data were collected. D Excel file: data14-13.xlsx Distance to Work Number of Days (miles) Absent 8. 8. 9. 8 6. 10 12 14 14 4 18 If required, enter negative values as negative numbers. a. Select the correct scatter diagram for these data. A. Number of Days Absent 10+ 8+ . 6- 2+ 8. 10 12 14 16 18 20 Distance to Work (miles) 4.arrow_forwardMany parents allow underage children to drink alcohol in limited situations when an adult is present to supervise. The idea is that teens will learn responsible drinking habits if they first experience alcohol in a controlled environment. Other parents take a strict no-drinking approach. Researchers surveyed a sample of 200 students aged 14 to 17, about their alcohol use and about alcohol related problems. Using a=0.05, answer the questions No Alcohol related Problems Alcohol Related Problems Not allowed to drink 71 9 80 Allowed to drink 89 31 |120 160 40 N=200 What is the alternative hypothesis? [ Select] What is the null hypothesis? [ Select] What inferential test is being conducted? [ Select] What is the obtained statistic? [ Select ] What determines the critical value? [ Select ] What is the critical value? [ Select ] What is the decision rule? [ Select] What is your decision? [ Select] What is your conclusion? [ Select ]arrow_forwardRecently the European Community (EC) decided to lower its subsidies to makers of pasta. In deciding by what amount to reduce total subsidies, experiments were carried out for determining the possible reduction in exports, mainly to the United States, that would result from the subsidy reduction. Over a small range of values, economists wanted to test whether there is a positive correlation between level of subsidy and level of exports. A computer simulation of the economic variables involved in the pasta exports market was carried out. The results follow. Assuming that the simulation is an accurate description of reality and that the values obtained may be viewed as a random sample of the populations of possible outcomes, state whether you believe that a positive rank correlation exists between subsidy level and exports level over the short range of values studied Qarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Economics (12th Edition)EconomicsISBN:9780134078779Author:Karl E. Case, Ray C. Fair, Sharon E. OsterPublisher:PEARSON
Engineering Economy (17th Edition)EconomicsISBN:9780134870069Author:William G. Sullivan, Elin M. Wicks, C. Patrick KoellingPublisher:PEARSON
Principles of Economics (MindTap Course List)EconomicsISBN:9781305585126Author:N. Gregory MankiwPublisher:Cengage Learning
Managerial Economics: A Problem Solving ApproachEconomicsISBN:9781337106665Author:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike ShorPublisher:Cengage Learning
Managerial Economics & Business Strategy (Mcgraw-...EconomicsISBN:9781259290619Author:Michael Baye, Jeff PrincePublisher:McGraw-Hill Education
Principles of Economics (12th Edition)
Economics
ISBN:9780134078779
Author:Karl E. Case, Ray C. Fair, Sharon E. Oster
Publisher:PEARSON
Engineering Economy (17th Edition)
Economics
ISBN:9780134870069
Author:William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher:PEARSON
Principles of Economics (MindTap Course List)
Economics
ISBN:9781305585126
Author:N. Gregory Mankiw
Publisher:Cengage Learning
Managerial Economics: A Problem Solving Approach
Economics
ISBN:9781337106665
Author:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike Shor
Publisher:Cengage Learning
Managerial Economics & Business Strategy (Mcgraw-...
Economics
ISBN:9781259290619
Author:Michael Baye, Jeff Prince
Publisher:McGraw-Hill Education