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A library checks out an average of 387 books per day with a standard deviation of...

A library checks out an average of 387 books per day with a standard deviation of 70 books. The number of books checked out follows an unknown distribution. Consider a random sample of 106 days of operation. Let ¯¯¯ X = X ¯ = the average number of books checked out per day over a selection of 106 days. ¯¯¯ X ˜ X ¯ ~ ( , )

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