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QUESTION

Suppose that the mean expenditure per customer at a tire store is 85.00, with a standard deviation of 9.

Suppose that the mean expenditure per customer at a tire store is 85.00, with a standard deviation of 9.00. If a random sample of 40 customers is taken, what is the probability that the sample average expenditure per customer for this sample will be 87.00 or more?

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