The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 12.8 minutes and a...

The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 12.8 minutes and a standard deviation of 3.8 minutes. Let x¯be the mean delivery time for a random sample of 40 orders at this restaurant. Calculate the mean and standard deviation of x¯.

Round your answers to two decimal places.

Mean of x¯=  minutes

Standard deviation of x¯=  minutes