A manager is interested in determining if the population standard deviation has dropped below 130. Based on

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A manager is interested in determining if the population standard deviation has dropped below 130.

Based on a sample of n  20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 105.

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Business Statistics A Decision Making Approach

ISBN: 9780136121015

8th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry, Kent D. Smith

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