CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
13th Edition
ISBN: 9781337094399
Author: Cochran
Publisher: IACCENGAGE
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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
CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
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