Calculating Power Consider a hypothesis test of the claim that the MicroSort method of
Chapter 8, Problem 36(choose chapter or problem)
Calculating Power Consider a hypothesis test of the claim that the MicroSort method of gender selection is effective in increasing the likelihood of having a baby girl, so that the claim is p > 0.5 . Assume that a significance level of = 0.05 is used, and the sample is a simple random sample of size n = 64. a. Assuming that the true population proportion is 0.65, find the power of the test, which is the probability of rejecting the null hypothesis when it is false. (Hint: With a 0.05 significance level, the critical value is z = 1.645 , so any test statistic in the right tail of the accompanying top graph is in the rejection region where the claim is supported. Find the sample proportion p ^ in the top graph, and use it to find the power shown in the bottom graph.) d b. Explain why the redshaded region of the bottom graph represents the power of the test.
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