FINANCIAL ACCOUNTING
10th Edition
ISBN: 9781259964947
Author: Libby
Publisher: MCG
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How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the population standard deviation is 20. Round your answer to next whole number.
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we have been given 95% confidence and a population standard deviation of 20 and we want to find n- sample size that will give us a margin of error 6 or close enough anyway. And first off, in order to do that, we need to find the pertinent Z value which is calculated using the following formulae :
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