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Suppose we want a 99% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent

Suppose we want a 99% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $18.

(a) How large should the sample be if the margin of error is to be less than $3? ANSWER:

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