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Automatic teller machine (ATM) withdrawal amounts have anunknowndistributionwith a mean of $50 and a standard deviation of $15. (a)If possible, calculate the probability that a

Automatic teller machine (ATM) withdrawal amounts have anunknowndistributionwith a mean of $50 and a standard deviation of $15.

(a)If possible, calculate the probability that a randomly selected sample of 40ATM withdrawals has a mean that is greater than $55. If the probability cannot be calculated, explain why.

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