Question

Accuracy in taking orders at a drive-through window is important for fast-food chains. Peri- odically, QSR Magazine publishes "The Drive-Thru Performance Study: Order Accuracy" that measures the percentage of orders that are filled correctly. In a recent month, the percentage of orders filled correctly at Wendy's was approximately 86.8%. Suppose that you go to the drive-through window at Wendy's and place an order. Two friends of yours independently place orders at the drive-through window at the same Wendy's. What are the probabilities that that all three orders will be filled correctly? Display graph.

Answer 1

6 ven that ot Wendy's uns appommaldy P 0.868 nomi USin 0-868 0-132 0.002 2q +0.04537+0.29835+ 0. 65392 -0 99998 0.999

Answer 2

A fast food chain has developed a new process to ensure that orders at the drive-through are filled correctly. The business problem is defined as determining whether the new process can increase the percentage of order processed correctly. The previous process filled orders correctly 85% of the time. Date are collected from a sample of 100 orders using a new process, the results indicated that 94 orders were filled correctly. At the 0.01 level of significance, can you conclude that the new process has increased the proportion of orders filled correctly?