LCL = ____ complaints per week (round your response to two decimal places)

An ad agency tracks the complaints, by week received, about the billboards in its city: No. of Complaints Week 1 2 3 4 5 7 5 7 4 19 This exercise contains only parts a, b, and c. a) The type of control chart that is best to monitor this process is c-chart b) Using z = 3, the control chart limits for this process are (assume that the historical complaints rate is unknown): UCL = complaints per week (round your response to two decimal places)