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

Week	No. of Complaints
1	3
2	6
3	3
4	17
5	6
6	10

This exercise contains only parts a, b, and c.

Part 2a) The type of control chart that is best to monitor this process is

cchart or x-chart?

.

Part 3b) Using z =3,

the control chart limits for this process are (assume that the historical complaints rate is unknown):

UCLc

=__________

complaints per week (round your response to two decimal places).