Question: BASF Inc. makes CDs for use in computers. A quality control engineer at the plant tests batches of 50 disks at a time and plots the proportions of defective disks on a control chart. The first 10 batches used to create the chart had the following numbers of defective disks:
8, 7, 6, 7, 8, 4, 3, 5, 5, 8.
Construct the chart and interpret the results.