Mathematics, 24.03.2020 20:48 ghari112345

It is known that the amounts of time required for room-service delivery at a certain Marriott Hotel are Normally distributed with the average delivery time of 20 minutes. Answer the following questions. Question 1 (3 points). In case a random sample of 11 deliveries was selected and the standard deviation of these delivery times was found to be 7.87 minutes, find the probability that their average delivery time is less than 23 minutes.

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It is known that the amounts of time required for room-service delivery at a certain Marriott Hotel...