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A retail bank believes the replacement cycle for lost ATM cards is normally distributed with a mean of 10 days and a standard deviation of

A retail bank believes the replacement cycle for lost ATM cards is normally distributed with a mean of 10 days and a standard deviation of 3.75 days. In an attempt to reduce customer dissatisfaction with the time delays in replacing lost ATM cards, a retail bank monitors replacement cycle time for 5 requests each week for a period of 20 weeks.

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