A statistician estimates the 90% confidence interval for the mean of a normally distributed population as 172.58

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A statistician estimates the 90% confidence interval for the mean of a normally distributed population as 172.58 ± 3.74 at the end of a sampling experiment, assuming a known population standard deviation. What is the 95% confidence interval?

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Complete Business Statistics

ISBN: 9780077239695

7th Edition

Authors: Amir Aczel, Jayavel Sounderpandian

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Question Posted: Jun 03, 2015 05:57 AM

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A statistician estimates the 90% confidence interval for the mean of a normally distributed population as 172.58

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