Independent random samples of n1 = n2 = n observations are to be selected from each of

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Independent random samples of n1 = n2 = n observations are to be selected from each of two populations 1 and 2. If you wish to estimate the difference between the two population means correct to within .17, with probability equal to .90, how large should n1 and n2 be? Assume that you know σ21 ≈ σ22 ≈ 27.8.
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Introduction To Probability And Statistics

ISBN: 9781133103752

14th Edition

Authors: William Mendenhall, Robert Beaver, Barbara Beaver

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