Homework3_solution

# Homework3_solution - Homework#3 Solutions 7.1(a From...

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Homework #3 Solutions 7.1 (a) From equation (7.5) He needs to catch 56 fish. (b) If n=100, then The new margin of error is or 74% of the old margin of error. 7.4 (a) Range=\$350-\$10=\$340. Therefore, a rough estimate of . For a 95% CI with a margin of error of 10, using equation (7.5), Therefore, 278 incorrect orders need to be sampled. (b) For a 99% CI with a margin of error of 10, Therefore, 480 incorrect orders needs to be sampled. 7.6 (a) The appropriate hypotheses are : ozs. vs ozs. The alternative should be two-sided, since the mean could shift in either direction. (b) The decision rule is to reject if

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i.e. if i.e. if either or (c) If , the power for this 2-sided test is, from equation(7.9), P(reject (d) To assure 90% power for detecting a difference of 0.1 ozs, use =1-Power=0.1. Then, from equation (7.11), Therefore, 11 cans should be sampled. 7.7 (a) The observed test statistic is Since this is a 1-sided test, the P-value is
Our conclusion is not to reject at level since the P-value. There is not sufficient

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Homework3_solution - Homework#3 Solutions 7.1(a From...

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