The mean waiting time at the drive through of a fast food restaurant from the time an order is placed to the time the order is received is 85.6 seconds a manager devises a new drive through system that he believes will decrease wait time as a test he initiates the new system at his restaurant and measures the wait time for 10 randomly selected orders the wait times are provided in the table to the right complete a and b
a) Calculate the mean wait time for the 10 orders
Mean wait time = (80 + 75 + 90 + 85 + 70 + 95 + 65 + 85 + 80 + 90) / 10 = 81.5 seconds
b) Is the manager's new system successful in decreasing wait time?
Yes, the manager's new system is successful in decreasing wait time since the mean wait time for the 10 orders is 81.5 seconds, which is lower than the mean wait time of 85.6 seconds before the new system was implemented.