A food service manager wants to be 95% certain that the error in the estimate of the

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A food service manager wants to be 95% certain that the error in the estimate of the mean number of sandwiches dispensed over the lunch hour is 10 or less. What sample size should be selected if a preliminary sample suggests
(a) σ = 40?
(b) σ = 80?
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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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