You are in charge of quality control for shirts supplied by your vendor. You take 18 samples, each with 24 shirts. You find that a total of 17 shirts are defective.
A. Identify the most appropriate control chart, explain why it is the most appropriate, and calculate 3-sigma control limits for it.
B. You take 3 more samples, each with 24 shirts, and find that there are 2, 0, 1 and 1 defective shirts in the respective samples. Is the process in statistical control?