EBK STATISTICS FOR BUSINESS & ECONOMICS
12th Edition
ISBN: 8220100460463
Author: Anderson
Publisher: CENGAGE L
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Chapter 10.3, Problem 26E
Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed in PGA tournaments are shown in the following table. Suppose you would like to determine if the
| Player | First Round | Final Round |
| Michael Letzig | 70 | 72 |
| Scott Verplank | 71 | 72 |
| D. A. Points | 70 | 75 |
| Jerry Kelly | 72 | 71 |
| Soren Hansen | 70 | 69 |
| D. J. Trahan | 67 | 67 |
| Bubba Watson | 71 | 67 |
| Reteif Goosen | 68 | 75 |
| Jeff Klauk | 67 | 73 |
| Kenny Perry | 70 | 69 |
| Aron Price | 72 | 72 |
| Charles Howell | 72 | 70 |
| Jason Dufner | 70 | 73 |
| Mike Weir | 70 | 77 |
| Carl Pettersson | 68 | 70 |
| Bo Van Pelt | 68 | 65 |
| Ernie Els | 71 | 70 |
| Cameron Beckman | 70 | 68 |
| Nick Watney | 69 | 68 |
| Tommy Armour III | 67 | 71 |
- a. Use α = .10 to test for a statistically significantly difference between the population means for first- and fourth-round scores. What is the p-value? What is your conclusion?
- b. What is the point estimate of the difference between the two population means? For which round is the population mean score lower?
- c. What is the margin of error for a 90% confidence
interval estimate for the difference between the population means? Could this confidence interval have been used to test the hypothesis in part (a)? Explain.
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Chapter 10 Solutions
EBK STATISTICS FOR BUSINESS & ECONOMICS
Ch. 10.1 - The following results come from two independent...Ch. 10.1 - Consider the following hypothesis test....Ch. 10.1 - Consider the following hypothesis test....Ch. 10.1 - Cond Nast Traveler conducts an annual survey in...Ch. 10.1 - The USA Today reports that the average expenditure...Ch. 10.1 - Suppose that you are responsible for making...Ch. 10.1 - Consumer Reports uses a survey of readers to...Ch. 10.1 - Will improving customer service result in higher...Ch. 10.2 - The following results are for independent random...Ch. 10.2 - Consider the following hypothesis test....
Ch. 10.2 - Consider the following data for two independent...Ch. 10.2 - The U.S. Department of Transportation provides the...Ch. 10.2 - The average annual cost (including tuition, room,...Ch. 10.2 - Are nursing salaries in Tampa, Florida, lower than...Ch. 10.2 - Commercial real estate prices and rental rates...Ch. 10.2 - The College Board provided comparisons of...Ch. 10.2 - Periodically, Merrill Lynch customers are asked to...Ch. 10.2 - Researchers at Purdue University and Wichita State...Ch. 10.3 - Consider the following hypothesis test. H0:d0Ha:d0...Ch. 10.3 - The following data are from matched samples taken...Ch. 10.3 - A market research firm used a sample of...Ch. 10.3 - The price per share of stock for a sample of 25...Ch. 10.3 - Bank of Americas Consumer Spending Survey...Ch. 10.3 - The Global Business Travel Association reported...Ch. 10.3 - The College Board SAT college entrance exam...Ch. 10.3 - Scores in the first and fourth (final) rounds for...Ch. 10.3 - A manufacturer produces both a deluxe and a...Ch. 10.4 - Consider the following results for independent...Ch. 10.4 - Consider the hypothesis test H0:p1p20Ha:p1p20 The...Ch. 10.4 - A Businessweek/Harris survey asked senior...Ch. 10.4 - The Professional Golf Association (PGA) measured...Ch. 10.4 - An American Automobile Association (AAA) study...Ch. 10.4 - Chicago OHare and Atlanta Hartsfield-Jackson are...Ch. 10.4 - Businessweek reported that there seems to be a...Ch. 10.4 - In a test of the quality of two television...Ch. 10.4 - Winter visitors are extremely important to the...Ch. 10.4 - The Adecco Workplace Insights Survey sampled men...Ch. 10 - Safegate Foods, Inc., is redesigning the checkout...Ch. 10 - Home values tend to increase over time under...Ch. 10 - Mutual funds are classified as load or no-load...Ch. 10 - The National Association of Home Builders provided...Ch. 10 - Prob. 42SECh. 10 - Country Financial, a financial services company,...Ch. 10 - A large automobile insurance company selected...Ch. 10 - Medical tests were conducted to learn about...Ch. 10 - Vacation occupancy rates were expected to be up...Ch. 10 - Prob. 47SECh. 10 - One of the researchers voiced concern about the...
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