Use the following data to construct a c-chart to answer questions 15 and 16.

The data below represents the number of complaints recorded the customer service desk at a local call center. The data shows the number of complaints logged each day over a seven day period.

Day	Complaints Received
1	5
2	7
3	15
4	8
5	9
6	12

15. What is the upper control limit of the c-chart?

a. 1.25

b. 18.50 (i think)

c. 19.26

d. No upper control limit with an out of control process.

16. Which of the following are true about the process?

a. Special causes of variation are indicated

b. The process is not in control

c. Process is within undefined limits.

d. The process is in control (I think) my excel won't give me a chart it keeps on erroring