Cholesterol Palace is a fast-food restaurant.Management was concerned with errors in filling orders at its drive-up window.It hired several undercover quality inspectors to randomly place 100 orders while the process seemed to be in control.The completed orders were then checked for accuracy.The following table shows the results of the survey:
(a)Use these data to estimate the average number of defects per order and determine the three-sigma control limits for a c-chart.
(b)A quality inspector just used the drive-up window and now checks her order.Her cheeseburger has mustard on it although she ordered it without ketchup or mustard.Three handfuls of ketchup and mustard packets are in the sack,but no napkins.And hot coffee has spilled because the lid wasn't properly sealed.Is the drive-up process in control?

Question

Quizplus · Accepted Answer

The Answer of Cholesterol Palace is a fast-food restaurant.Management was concerned with errors in filling orders at its drive-up window.It hired several undercover quality inspectors to randomly place 100 orders while the process seemed to be in control.The completed orders were then checked for accuracy.The following table shows the results of the survey:
(a)Use these data to estimate the average number of defects per order and determine the three-sigma control limits for a c-chart.
(b)A quality inspector just used the drive-up window and now checks her order.Her cheeseburger has mustard on it although she ordered it without ketchup or mustard.Three handfuls of ketchup and mustard packets are in the sack,but no napkins.And hot coffee has spilled because the lid wasn't properly sealed.Is the drive-up process in control?

Cholesterol Palace Is a Fast-Food Restaurant