The Quality Control Manager at a Credit Card Collection Center is concerned about how many complaints the company is getting from customers. The following data were collected for 15 days of operation:

-------Sample Number: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Number of Complaints: 12 0 4 9 14 6 2 10 10 3 9 4 2 7 9

Determine lower and upper control limits for the number of complaints they should expect each day using three-sigma limits.

options:

	.751 , 13.121
	1.502 , 11.83
	0 , 14.412
	0 , 16.994
	None of the Above