Baseball Fans The primary day of baseball comes in late Walk, finishing off with October with the World Arrangement. Does fan support develop as the season goes on? Two CNN/USA Today/Gallup surveys, one led in Spring and one in November, both included irregular examples of 1001 grown-ups matured 18 and more established. In the Walk test, 45% of the grown-ups professed to be aficionados of expert baseball, while 51% of the grown-ups in the November test professed to be fans.14

a. Develop a 99% certainty stretch for the distinction in the extent of grown-ups who guarantee to be fans in Spring versus November.

b. Does the information demonstrate that the extent of grown-ups who guarantee to be fans expansions in November, around the hour of the World Arrangement? Clarify.

Ben Roethlisberger #7 The number of passes completed by Ben Roethlisberger, quarterback for the Pittsburgh Steelers, was recorded for each of the 12 regular season games in which he played during the fall of 2010 (www.ESPN.com): 16 19 17 17 30 18 20 22 21 23 22 15 a. A stem and leaf plot of the n = 12 observations is shown below: Stem-and-Leaf Display: Roethlisberger Stem-and-leaf of Roethlisberger N = 12 Leaf Unit = 1.0 5 677 89 01 WNNNNNPPP 223 0 Based on this plot, is it reasonable to assume that the underlying population is approximately normal, as required for the one-sample t-test? Explain. b. Calculate the mean and standard deviation for Ben Roethlisberger's per game pass completions. c. Construct a 95% confidence interval to estimate the average pass completions per game for Ben Roethlisberger.Bulimia In a study.r to determine which factors predict who will benet from treatment for bulimia nervosa, an article in the British Journal of Clinical Psychology indicates that selfesteem was one of these important predictorsri The table gives the mean and standard deviation of self esteem scores prior to treatment, at posttreatment, and during a followup: Pretreatment Posttreatment Follow-up Sample Mean f 20.3 25.5 2?] Standard Deviation s 5. ill 8.2 Sample Size n 21 21 20 :1. Use a test of hvpothesis to determine whether there is sufcient evidence to conclude that the true pretreatment mean is less than 25. b. Construct a 95% condence interval for the true posttreatment mean. e. In Section 142M, we will introduce smallsample techniques for making inferences about the difference between two population means. Without the formality.r of a statistical test, what are vou willing to conclude about the differences among the three sampled population means represented bv the results in the table? Hamburger Meat These data are the weights (in pounds) of 27 packages of ground beef in a supermarket meat display: 1.08 99 .97 1.18 1.41 1.28 83 1.06 1.14 1.38 .75 96 1.08 87 89 89 96 1.12 1.12 .93 1.24 89 .98 1.14 .92 1.18 1.17 a. Interpret the accompanying MINITAB printouts for the one-sample test and estimation procedures. MINITAB output for Exercise 10.15 One-Sample T: Weight Test of mu = 1 vs not = 1 Variable N Mean StDev SE Mean Weight 27 1 . 0522 0 . 1657 0 . 0319 Variable 95% CI T P Weight (0. 9867, 1.1178) 1 . 64 0. 113 b. Verify the calculated values of t and the upper and lower confidence limits