A bank officer wants to determine the amount of the average total monthly deposits per customer at the bank. He believes an estimate of this average amount using a confidence interval is sufficient. He assumes the standard deviation of total monthly deposits for all customers is about $804.1. How large a sample should he take to be within $150 of the actual average with 99% confidence?
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A bank officer wants to determine the amount of the average total monthly deposits per customer at the bank. He believes an estimate of this average amount using a confidence interval is sufficient. How large a sample should he take to be within $200 of the actual average with 99% confidence? He assumes the standard deviation of total monthly deposits for all customers is about $1,000. (Round your answer up to the nearest integer.)
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A bank officer wants to determine the amount of the average total monthly deposits per customer at the bank. He believes an estimate of this average amount using a confidence interval is sufficient. How large a sample should he take to be within $200 of the actual average with 99% confidence? He assumes the standard deviation of total monthly deposits for all customers is about $1,000.
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A bank officer wishes to estimate the average total deposits per customer at the bank. She would like the estimate to be within $200 of the actual average with 95% confidence. She assumes the standard deviation for this should be $1000. How large should the sample be?
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