(Answered) The delivery times for all food orders at a fast-food

Statistics

The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 12.6 minutes and a standard deviation of3.9minutes. Let x¯be the mean delivery time for a random sample of 10 orders at this restaurant. Calculate the mean and standard deviation of x¯.

Round your answers to two decimal places.

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