6. Suppose we wish to test the hypothesis H.:u=15 vs. H : [#15 where we know that o2 =9.0. If the true mean is actually
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6. Suppose we wish to test the hypothesis H.:u=15 vs. H : [#15 where we know that o2 =9.0. If the true mean is actually
6. Suppose we wish to test the hypothesis H.:u=15 vs. H : [#15 where we know that o2 =9.0. If the true mean is actually 20, what sample size must be used to ensure that the probability of type II error is no greater than 0.05? Assume a =0.05.
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