Find the sample size

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Question

Scores on a certain test are normally distributed with a variance of 56. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure 98 percent confidence that the sample mean will not differ from the population mean by more than 3 units. P... Mar 26 2012 10:03 PM

 

Solution ID:609171 | This paper was updated on 26-Nov-2015

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