If the true mean is really 20 what sample size must be used

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Reference no: EM13602914

Suppose we wish to test the hypotheses: H(o): u=15 H(1): u does not = 15 where we know that sigma^2 = 9.0. If the true mean is really 20, what sample size must be used to ensure that the probability of type II error is no greater than 0.10? Assume that alpha = 0.05.

Reference no: EM13602914

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