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Confidence interval for the mean sales per customer

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Reference no: EM132372815

A clothing store manager takes a random sample of 40 sales for the day. From this sample the manager calculated that the mean sale amount per customer was $88 with a standard deviation of $12. Assume that sales per customer is approximately normally distributed. Construct a 99% confidence interval for the mean sales per customer.

Reference no: EM132372815

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