What sample size is required in order that the standard deviation of be: (a) 1/4 of

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What sample size is required in order that the standard deviation of  be:
(a) 1/4 of the population standard deviation?
(b) 1/7 of the population standard deviation?
(c) 12% of the population standard deviation?
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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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