DVD Rental Store
a DVD Rental Store Wants to Know $\hat { p }$

DVD Rental Store
A DVD rental store wants to know what proportion of its customers are under age 21.A simple random sample of 500 customers was taken,and 375 of them were under age 21.Presume that the true population proportion of customers under age 21 is 0.68.
-{DVD Rental Store Narrative} Find the mean and standard deviation of $\hat { p }$ .

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