a. At the a > .05 level of significance. what is the difference, if any, in the Population mean times among the four machines? b. Use Fisher's LSD Procedure to test for the cluality of the means for machines 2 and 4. Use a .05 level of significance. 19. Refer to exercise 18. Use the Bonferroni adjustment to test for a significant difference between all Pairs of means. Assume that a maximum overall experimentwise error rate of .05 is desired. 20. The International League of Triple_A minor league baseball consists of 1 4 teams organized into three divisions: North. South and West The following data show the average atten. dance for the 14 teams in the International League (The Biz of Baseball website. January 2009). Also shown are the teams' records. W denotes the number of Sames won. L denotes the number of Sames lost and PCT is the ProPortion of Sames Played that were won. Team Name Division W L PCT Attendance Buffalo Bisons North 66 77 462 881 2 Lehigh Valley IronPies North 55 89 382 8479 Pawtucket Red Sox North 85 58 594 9097 Rochester Red Wings North 74 70 .514 6913 WEB file Scranton. Wilkes Barre Yankees North 88 56 61 1 71 47 Syracuse Chiefs North 69 73 486 5765 Charlotte Knights South 63 78 447 4526 Triple_A Durham Bulls South 74 70 51 4 6995 Norfolk Tides South 64 78 451 6286 Richmond Braves South 63 78 447 4455 Columbus Clippers West 69 73 486 7795 IndianaPolis Indians West 68 76 472 8538 Louisville Bats West 88 56 .611 9152 Toledo Mud Hens West 75 69 .521 8234 a Use a > .05 to test for any difference in the mean attendance for the three divisions. b. Use Fisher's LSD Procedure to determine where the differences occur. Use a >.05