Uncle’s Pizza is doing good business in Delhi due to its prompt home delivery system. It guarantees that the pizza will be delivered within 30 minutes from the time order was placed or the order is free. The time that it takes to deliver each order on time is maintained in the Pizza Time System. Fourteen random entries from the Pizza Time System are listed.

10.1 19.6 12.2 32.6 18.2 29.5 13.2 30 10.8 14.8 22.1 15.6 45.6 15.6

a. Find the mean for the sample.

b. Explain if this sample can be used to estimate the average time that it takes for Uncle’s Pizza to deliver the pizza.