Is the process in control according to the control limits

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Reference no: EM131358082

An ad agency tracks the complaints, by week received, about the billboards in its city:

Week	No. of Complaints
1	4
2	5
3	4
4	11
5	3
6	9

a) What type of control chart would you use to monitor this process? Why?

b) What are the 3-sigma control limits for this process? Assume that the historical complaint rate is unknown.

c) Is the process in control, according to the control limits? Why or why not?

d) Assume now that the historical complaint rate has been four calls a week. What would the 3-sigma control limits for this process be now? Has the process been in control according to the control limits?

Reference no: EM131358082

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