Within plus or minus ten dollars of the true mean. the, Ask an Expert

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The Armed Forces Credit Union wants to know what sample size is needed to be able to estimate the mean dollars that each card holder will spend each month. It wants a 98% confidence level within plus or minus ten dollars of the true mean. The standard deviation is thought to be $500.00 (CTU, 2010) The determination of the sample size must be figured out.

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