6.

This exercise contains only parts a, b, and c. The type of control chart that is best to monitor this process is c - charT. Using z = 3, the control chart limits for this process are (assume that the historical complaints rate is unknown): UCL_c = 15.72 complaints per week (round your response to two decimal places). LCL_c = complaints per week (round your response to two decimal places and if your answer is negative, enter this value as 0)