Question 7 (2.6 points)

Loan Processing times are being monitored at a local company. Samples of ten observations each have been taken, and the results are listed. Using Factors from Table 10.2, determine lower and upper control limits for a a Range chart

Sample Number 1 2 3

------------- 79 81 77

------------- 72 79 83

------------- 74 70 82

------------- 82 81 84

------------- 69 64 80

------------- 82 76 71

------------- 82 85 64

------------- 90 69 85

------------- 76 71 83

------------- 72 75 85

Question 7 options:

	4.62 , 37.38
	2.31 , 45.675
	0 , 53.97
	64.159 , 90.706
	None of the Above

Question 8 (2.6 points)

Using samples of 200 credit card statements, an Auditor found the following:

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

Number of Errors: 19 9 17 19 14 12 17 9 14 15 19 20 11 21 11

Determine lower and upper control limits for the fraction of errors using three-sigma limits.

Question 8 options:

	.019 , .131
	.028 , .122
	.038 , .113
	0 , .15
	None of the Above

Question 9 (2.5 points)

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: 3 9 13 15 13 5 12 9 8 12 4 11 12 13 8

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

Question 9 options:

	0 , 22.321
	1.973 , 17.626
	3.539 , 16.06
	.408 , 19.191
	None of the Above