Suppose the investigator referred to in Exercise 15.9 decided that instead of running one group and comparing
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(a) How many subjects does she now need (overall) if she is to have power equal 0.60?
(b) How many subjects does she now need (overall) if she is to have power equal 0.90?
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Fundamental Statistics for the Behavioral Sciences
ISBN: 978-1285076911
8th Edition
Authors: David C. Howell
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