If a normal population is known to have equal to 10, how large a sample should

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If a normal population is known to have σ equal to 10, how large a sample should we take in order to be 90 % confident that the sample mean will not differ from the population mean by more than ±.75 units?

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Statistics For Business And Financial Economics

ISBN: 9781461458975

3rd Edition

Authors: Cheng Few Lee , John C Lee , Alice C Lee

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