HW8 - 36-226 HOMEWORK 8 Due Monday at 9:30am in class...

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36-226 HOMEWORK 8 Due: Monday 4/11/16 at 9:30am in class Remember to show all work ; just writing down the answer will not receive credit. 1. Exercise 10.2 in Wackerly. 2. Exercise 10.6 in Wackerly. 3. Altered Wackerly 10.17 Briefly, we’re interested in the amount of breaststroke training (in meters) for two types of competitive swimmers: those who specialize in breaststroke and those who specialize in the individual medley (all four strokes). The training habits of two groups of swimmers (Group 1 = breaststroke; Group 2 = IM) were analyzed, giving the following information: n 1 = 130; ¯ x 1 = 9017m; s 2 1 = 7162 2 n 2 = 80; ¯ x 2 = 5853m; s 2 2 = 1961 2 (a) Test the null hypothesis that the breaststroker group averages 10,000m a week of breaststroke training against the alternative of not 10,000m (steps on next page) . Write down your null and alternative hypotheses. Find the Rejection Region for α = 0 . 05 and α = 0 . 10. Calculate your test statistic. Find the exact p-value for your test statistic using R and an approximate p-value using Table 4, Appendix 3.
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