. Control Chart for Defects The Medassist Pharmaceutical Company manufactures aspirin tablets. Each day, 100 tablets are randomly selected and tested. A tablet is considered defective if it has obvious physical deformities or the aspirin content is less than 490 mg or greater than 510 mg. The numbers of defects are listed below for x

x x

Cooperative Group Activities 754 Chapter 14 Statistical Process Control consecutive days. Construct an appropriate control chart and determine whether the process is within statistical control. If not, identify which criteria lead to rejection of statistical stability.

Defects: 4 2 2 3 5 2 9 12 1 11 3 2 12 14