options for part a are "p chart", "x chart", and "c chart" options for part c are "out of control" or "in control"

An ad agency tracks the complaints, by week received, about the billboards in its city: This exercise contains only parts a, b, and c. a) The type of control chart that is best to monitor this process is b) Using z=3, the control chart limits for this process are (assume that the historical complaints rate is unknown): UULe= complaints per week (round your response to two decimal places). LCLe= complaints per week (round your response to two decimal places and if your answer is negative, enter this value as 0 ). c) According to the control limits, the process has been