Question

Suppose that the incomes of all people in the United States who own hybrid (gas and electric) automobiles are normally distributed with a mean of $78,000 and a standard deviation of $8300. Let  be the mean income of a random sample of 50 owners of such automobiles. Calculate the mean and standard deviation of  and describe the shape of its sampling distribution.


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  • CreatedAugust 25, 2015
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