How many card holders be sampled in standard deviation

Reference no: EM13149397

Armed forces credit union would like the required sample size needed to be able to estimate the mean dollars that each card holder will spend each month. It would like to be plus or minus $10 of the true mean with a 98% confidence level. The standard deviation is thought to be $500. How many card holders should be sampled?

Reference no: EM13149397

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