A government auditor investigating consumer complaints about Gelman Merchandising over-charging its customers plans to select a simple
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A government auditor investigating consumer complaints about Gelman Merchandising over-charging its customers plans to select a simple random sample of Gelman customers to estimate the average overcharge amount per customer. The auditor plans to produce a 99% confidence interval estimate that is no wider than $25. For a pilot sample, the standard deviation of overcharge amounts is $330.
Recommend the appropriate number of customers that need to be contacted for the investigation.
Related Book For
Introductory Statistics Exploring The World Through Data
ISBN: 9780135163146
3rd Edition
Authors: Robert Gould, Rebecca Wong, Colleen N. Ryan
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