Chapter 19, Problem 13E

Sam’s Supermarkets monitors the checkout scanners by randomly examining the receipts for scanning errors. On October 27th, they recorded the following number of scanner errors on each receipt: 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0. Construct a control chart for this process and comment on whether the process is “in control.”