lean score? res for the two tests? Which test 26. 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 mean score for the first round of a PGA Tour event is significantly different than the mean score for the fourth and final round. Does the pressure of playing in the final come down? round cause scores to go up? Or does the increased player concentration cause scores to First Final Player First Final Round Round Player Round Round Michael Letzig 70 72 Aron Price 72 72 Scott Verplank 71 72 Charles Howell 72 70 D. A. Points 70 75 Jason Dufner 70 73 Jerry Kelly 72 71 Mike Weir 70 77 Soren Hansen 70 69 Carl Pettersson 68 70 D. J. Trahan 67 67 Bo Van Pelt 68 65 Bubba Watson 71 67 Ernie Els 71 70 Reteif Goosen 68 75 Cameron Beckman 70 68 Jeff Klauk 67 73 Nick Watney 69 68 69 Tommy Armour III 67 71 Kenny Perry 70 a. Use a = .10 to test for a statistically significantly difference between the popula- tion 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