An advertising company wishes to estimate the mean household income for all single working professionals who own

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An advertising company wishes to estimate the mean household income for all single working professionals who own a foreign automobile. If the advertising company wants a 90% confidence interval estimate with a margin of error of ± $2,500, what sample size is needed if the population standard deviation is known to be $27,500?
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Business Statistics A Decision Making Approach

ISBN: 9780133021844

9th Edition

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

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