The Western Jeans Company produces denim jeans. The company wants to establish a control chat to monitor the production process and maintain high quality. The company has taken 20 samples (one per day for 20 days), each containing 100 pairs of jeans, and inspected them for defects, the results of which are as follows.

Which control chart is most appropriate for this problem? Why? Is the production process in control? Explain by showing all your work including a control chart with 95% control limit.
 

Sample 1 Number of Defectives Sample 11 Number of Defectives 6 12 2 2 12 10 3 4 13 14 4 10 14 8 6 15 6 4 16 16 7 12 17 12 8 10 18 14 9 8 19 18 10 10 20 16