Advanced Placement (AP), 02.10.2020 21:01, lindsay45

Hungry Howies, a local pizza delivery chain, wants to provide the best service possible for its customers. They decide to record the delivery times 100 randomly selected days, taking the average each day. The resulting distribution is approximately normally with an overall mean of 31.2 minutes. (a) On one randomly selected day the average delivery time was 34 minutes, which is 0.43 standard deviations above the mean. What is the standard deviation of the distribution?

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Hungry Howies, a local pizza delivery chain, wants to provide the best service possible for its cust...