Suppose a manager at a local Domino’s Pizza would like to determine if the average time it takes to deliver a pizza and return to the store differs for the four employees who make the deliveries. The following data show a random sample of the delivery times for each driver. These data can also be found in the Excel file Dominos. xlsx.

a. Using α = 0.05, determine if the manager has enough evidence to conclude there is a difference in the delivery times of the four drivers.

b. If warranted, perform a multiple comparison test to determine which pairs are different using α = 0.05.

c. Verify your results with Excel or PHStat.

Driver Driver 2 Driver 3 Driver 4 40 32 28 29 40 27 24 13 16 21 13 34 14 10