Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)
6th Edition
ISBN: 9781337115186
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: Cengage Learning
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Chapter 12.1, Problem 3E
Television Audiences Across Networks. During the first 13 weeks of the television season, the Saturday evening 8 P.M. to 9 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following viewing audience data: ABC 95 homes, CBS 70 homes, NBC 89 homes, and independents 46 homes. Test with α = .05 to determine whether the viewing audience proportions changed.
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In a study of a group of women science majors who remained in their profession and a group who left their profession within a few months of graduation, the researchers collected the data shown here on a self-esteem questionnaire.
Leavers Stayers1 = 3.05 2 = 2.92σ1 = 0.71 σ2 = 0.71n1 = 100 n2 = 227At α = 0.05, can it be concluded that there is a difference in the self-esteem scores of the two groups? Use the P-value method.
The director of student services at San Bernardino Valley College is interested in whether women are more likely to attend orientation than men before they begin their coursework. A random sample of freshmen at San Bernardino Valley College were asked to specify their gender and whether they attended the orientation. The results of the survey are shown below:
Data for Gender vs. Orientation Attendance
Women
Men
Yes
399
361
No
260
264
Let p1 be the proportion of women who attended the orientation and p2p2 be the proportion of men who attended the orientation. What can be concluded at the αα = 0.01 level of significance?
The null and alternative hypotheses would be:
H0:H0: Select an answer μ1-μ2 μd μ p1-p2 p Select an answer ≠ < > = (please enter a decimal)
H1:H1: Select an answer μ1-μ2 p1-p2 μ μd p Select an answer ≠ = > < (Please enter a decimal)
The test statistic? t z = (please show your answer to 3 decimal places.)
The p-value =…
The director of student services at San Bernardino Valley College is interested in whether women are just as likely to attend orientation as men before they begin their coursework. A random sample of freshmen at San Bernardino Valley College were asked to specify their gender and whether they attended the orientation. The results of the survey are shown below:
Data for Gender vs. Orientation Attendance
Women
Men
Yes
422
529
No
267
268
Let p1 be the proportion of women who attended the orientation and p2p2 be the proportion of men who attended the orientation. What can be concluded at the α = 0.10 level of significance?
For this study, what sampling distribution should be used? Select an answer Chi-Square distribution uniform distribution standard normal distribution binomial distribution Student t distribution
The null and alternative hypotheses would be:
H0:H0: Select an answer μ μ1-μ2 p1-p2 μd p Select an answer ≠ < > = (please enter a decimal)…
Chapter 12 Solutions
Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)
Ch. 12.1 - Test the following hypotheses by using the χ2...Ch. 12.1 - Suppose we have a multinomial population with four...Ch. 12.1 - Television Audiences Across Networks. During the...Ch. 12.1 - M&M Candy Colors. Mars, Inc. manufactures M&M’s,...Ch. 12.1 - America’s Favorite Sports. The Harris Poll tracks...Ch. 12.1 - Traffic Accidents by Day of Week. The National...Ch. 12.2 - The following table contains observed frequencies...Ch. 12.2 - Prob. 8ECh. 12.2 - Airline Ticket Purchases for Domestic and...Ch. 12.2 - Hiring and Firing Plans at Private and Public...
Ch. 12.2 - Health insurance benefits vary by the size of the...Ch. 12.2 - Vehicle Quality Ratings. A J. D. Power and...Ch. 12.2 - Company Reputation and Management Quality Survey....Ch. 12.2 - Prob. 14ECh. 12.2 - The Carnegie Classification of Institutes of...Ch. 12.2 - Prob. 16ECh. 12.3 - Use the sample data below to test the...Ch. 12.3 - 2. reconsider the observed frequencies in exercise...Ch. 12.3 - Late Flight Comparison Across Airlines. The sample...Ch. 12.3 - Electronic Component Supplier Quality Comparison....Ch. 12.3 - Kate Sanders, a researcher in the department of...Ch. 12.3 - Error Rates in Tax Preparation. A tax preparation...Ch. 12.3 - Social networking is becoming more and more...Ch. 12.3 - Supplier Quality: Three Inspection Outcomes. The...Ch. 12 - In 2011, the industries with the most complaints...Ch. 12 - Bistro 65 is a chain of Italian restaurants with...Ch. 12 - Based on sales over a six-month period, the five...Ch. 12 - Pace-of-Life Preference By Gender. A Pew Research...Ch. 12 - Church Attendance by Age Group. The Barna Group...Ch. 12 - Ambulance Calls by Day of Week. An ambulance...Ch. 12 - Prob. 31SECh. 12 - Phoenix Marketing International identified...Ch. 12 - The five most popular art museums in the world are...Ch. 12 - In a study conducted by Zogby International for...Ch. 12 - Six months ago, Fuentes Salty Snacks, Inc., added...Ch. 12 - Fresno Board Games manufactures and sells several...
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- The director of student services at San Bernardino Valley College is interested in whether women are more likely to attend orientation than men before they begin their coursework. A random sample of freshmen at San Bernardino Valley College were asked to specify their gender and whether they attended the orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Women Men Yes 375 336 No 316 329 Let p1p1 be the proportion of women who attended the orientation and p2p2 be the proportion of men who attended the orientation. What can be concluded at the αα = 0.10 level of significance? What is the test statistic and p valuearrow_forwardIn a study of a group of women science majors who remained in their profession and a group who left their profession within a few months of graduation, the researchers collected the data shown here on a self-esteem questionnaire. Leavers Stayers 1 = 3.09 2 = 2.92 σ1 = 0.78 σ2 = 0.78 n1 = 107 n2 = 222 At α = 0.01, can it be concluded that there is a difference in the self-esteem scores of the two groups? Use the P-value method.arrow_forwardBased on the data below, the Cronbach’s alpha coefficient is Subject Item 1 Item 2 Item 3 Item 4 1 3 5 3 3 2 2 2 2 3 3 6 5 3 6 4 5 3 5 5 5 3 4 4 4 a. excellent b. good c. acceptable d. questionablearrow_forward
- Find the minimum sample size n needed to estimate muμ for the given values of c, sigmaσ, and E. c=0.95,σ=8.1, and E=2arrow_forwardA student organization is trying to decide whether or not to offer more movies on campus. They want to determine whether this idea will appeal to members of both genders. A random sample of 1000 students was asked if they were in favor of more movies on campus. The results by gender are shown in the table below in Figure 2.Fig. 2: Summary(a) What proportion of the sampled students is in favor of more movies on campus? (b) What proportion of the sampled females is in favor of more movies on campus? (c) What proportion of the sampled males is in favor of more movies on campus? (d) To answer the original question regarding whether or not to offer more movies on campus, which distribution should the student organization study? i. The joint distribution of gender and opinion.ii. The marginal distribution of gender. iii. The conditional distribution of gender given opinion. iv. The conditional distribution of opinion given gender.arrow_forwardConsider the following studies. Study I: A researcher randomly divided 200 high school students into two groups. The first group was told to not exercise. The second group was told to exercise at least 5 hours each week. At the end of two months, the heart rates of each participant in each group were measured at rest. It was found that the group that exercised 5 hours a week had a significantly lower average heart rate. Study II: A researcher gathered 200 high school students randomly, asked them how long they exercised each week, and then measured their heart rates at rest. It was found that students who exercised at least 5 hours a week had a significantly lower average heart rate. Part A: Which study was experimental? Why? Study IStudy II Part B: List the explanatory and response variables in the studies. Explanatory: heart rate; Response: exercise timeExplanatory: student; Response: amount of exerciseExplanatory: exercise time; Response: heart rate Part C: State whether the…arrow_forward
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