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 Range chart
Sample Number
|
1
|
2
|
3
|
|
62
|
66
|
58
|
|
68
|
61
|
52
|
|
62
|
70
|
64
|
|
53
|
56
|
65
|
|
55
|
52
|
59
|
|
62
|
49
|
57
|
|
76
|
56
|
57
|
|
58
|
48
|
49
|
|
43
|
52
|
57
|
|
45
|
65
|
55
|