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Unformatted text preview: “Reject H if x < 28.6” ? b) Suppose the consumer advocate tests a sample of n = 25 cars. Find the “best” rejection region with the significance level α = 0.05. c) Suppose the consumer advocate tests a sample of n = 25 cars and uses a 5% level of significance. Find the power of the test if the true mean is μ 1 = 29.5. d) Repeat part (c) for the case when the true value of the mean is μ 1 = 28.5. e) Repeat parts (c) and (d) using a larger sample size of n = 49. f) Repeat parts (c) and (d) using a 10% level of significance. g) What is the minimum sample size required if we want to have the power of at least 0.80 at μ 1 = 29.5 for the test with a 5% level of significance?...
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 Spring '11
 Stepanov
 Null hypothesis, Statistical hypothesis testing, Type I and type II errors, Statistical power, Consumer Advocate

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