BooksCDs.com sells books, videos, DVDs, and CDs through its Internet Web site. The company ships thousands of orders each day from seven national distribution centers. BooksCDs.com wants to establish a p-chart to monitor the quality of its distribution process, specifically the number of €œproblem€ orders. A problem order is one that is delivered to a customer late (i.e., after five days), incorrect or incomplete. The company sampled 500 orders every other day for 20 samples and tracked them to final customer delivery, the results of which are as follows:

Construct a p-chart for this process using 3σ limits and indicate if the process was out ofcontrol.

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Number of Number of Sample Problems Orders Sample Problems Orders 14 12 13 14 15 16 17 18 19 20 12 16 19 12