Suppose this study is a pilot study for a larger study. The investigators want to determine the

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Suppose this study is a pilot study for a larger study. The investigators want to determine the sample size in the larger study so that

(i) Power will be 90%

(ii) A two-sided test is used with a = .05

(iii) The means and standard deviations in each group are the same as in Problems 8.158 and 8.159

(iv) There are twice as many subjects in group 2 than in group 1. How many subjects should be enrolled in each group to achieve these objectives?

General

Suppose we have two groups with sample sizes of 8 and 15.

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Fundamentals Of Biostatistics

ISBN: 9781305268920

8th Edition

Authors: Bernard Rosner

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Question Posted: May 19, 2018 03:08 AM

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Suppose this study is a pilot study for a larger study. The investigators want to determine the

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We use the sample size formula n 1 2 1 2 2 k z 12 z ...View the full answer

Fundamentals Of Biostatistics

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