Fast Food Scenario

An important measure for fast-food restaurants is the order time, which is the amount of time it takes between when a customer places an order and when the customer receives his or her food. A local fast-food restaurant has told its employees that the maximum amount for order time should be 2.75 minutes. Ordering time data was collected for five randomly selected customers per day for 10 days.

Mean chart for samples 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 2 W 4 5 6 7 8 9 10Mean chart for samples 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 2 W 4 5 6 7 8 9 10Range chart for samples 3 2.5 2 1.5 0.5 0 1 2 3 4 5 6 7 8 9 10