A fast-food restaurant takes orders by phone and then prepares the food. The time required to process the phone orders is normally distributed with a mean of 5 minutes and a standard deviation of 1.5 minutes. The time it takes to get the food ready is normally distributed with a mean of 18 minutes and a standard deviation of 5.2 minutes. a. What is the mean for the total time to process a phone order and get the food ready at this restaurant? b. What is the standard deviation for the total time to process a phone order and get the food ready at this restaurant? c. What is the probability that this restaurant takes a total of less than 20 minutes to complete an order?
A fast-food restaurant takes orders by phone and then prepares the food. The time required to process the phone orders is normally distributed with a mean of 5 minutes and a standard deviation of 1.5 minutes. The time it takes to get the food ready is normally distributed with a mean of 18 minutes and a standard deviation of 5.2 minutes.
a. What is the mean for the total time to process a phone order and get the food ready at this restaurant?
b. What is the standard deviation for the total time to process a phone order and get the food ready at this restaurant?
c. What is the probability that this restaurant takes a total of less than 20 minutes to complete an order?
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