An ad agency tracks the complaints, by week received, about the billboards in it

Question

An ad agency tracks the complaints, by week received, about the billboards in its city: Week No. of Complaints 14 5 6 5 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, te control chart limits for this process are (assume that the historical complaints rate is unknown): ULe* complaints per week (round your response to two decima, places. LCLc- complaints per week (round your response to two decimal places and it your answer is negative, enter this value as o) c) According to the control limits, the process has been IN CONTROL OUT OF CONTROL IN CONTROL Enter your answer in each of the answer boxes.

Explanation / Answer

A. already done:

B.

Z=3

0.00

Week 4 is out of control.

Hence process is out of control.

week No of complaints 1 4 2 5 3 5 4 14 5 3 6 5 Total 36 C bar 6 (Complaints/Week) UCLc Cbar+Zsqrt(Cbar) 13.35 LCLc Cbar-Zsqrt(Cbar) -1.348469228 =

0.00

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