A personnel manager is interested in the average age of the companys 872 employees. Suppose he takes
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A personnel manager is interested in the average age of the company’s 872 employees. Suppose he takes a simple random sample of 35 of these employees and finds the sample standard deviation of their ages to be 12.3 years. The personnel manager wants to obtain a 95 % confidence interval for the population mean age with a level of precision of 2.4 years on each side of the sample mean. How many sample observations must he take?
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Related Book For 
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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