1. Five data entry operators work at the data processing department of the Royal Bank. Each day for 30 days, the number of defective records in a sample of 250 records typed by these operators has been noted, as follows: Sample No. No. Defective Sample No. No. Defective Sample No. No. Defective 1 18 11 17 21 7 2 5 12 12 22 5 3 16 13 6 23 19 4 4 14 7 24 10 5 11 15 13 25 11 6 8 16 10 26 8 7 12 17 4 27 12 8 4 18 6 28 9 9 6 19 12 29 6 10 16 20 3 30 13 Establish 3σ upper and lower control limits. Why can the lower control limit not be a negative number? The industry standards for the upper and lower control limits are 0.11 and 0.02, respectively. What does this imply about Royal Bank’s own standards?
1. Five data entry operators work at the data processing department of the Royal Bank. Each day for 30 days, the number of defective records in a sample of 250 records typed by these operators has been noted, as follows: Sample No. No. Defective Sample No. No. Defective Sample No. No. Defective 1 18 11 17 21 7 2 5 12 12 22 5 3 16 13 6 23 19 4 4 14 7 24 10 5 11 15 13 25 11 6 8 16 10 26 8 7 12 17 4 27 12 8 4 18 6 28 9 9 6 19 12 29 6 10 16 20 3 30 13 Establish 3σ upper and lower control limits. Why can the lower control limit not be a negative number? The industry standards for the upper and lower control limits are 0.11 and 0.02, respectively. What does this imply about Royal Bank’s own standards?
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Question
- 1. Five data entry operators work at the data processing department of the Royal Bank. Each day for 30 days, the number of defective records in a sample of 250 records typed by these operators has been noted, as follows:
|
Sample No. |
No. Defective |
Sample No. |
No. Defective |
Sample No. |
No. Defective |
|
1 |
18 |
11 |
17 |
21 |
7 |
|
2 |
5 |
12 |
12 |
22 |
5 |
|
3 |
16 |
13 |
6 |
23 |
19 |
|
4 |
4 |
14 |
7 |
24 |
10 |
|
5 |
11 |
15 |
13 |
25 |
11 |
|
6 |
8 |
16 |
10 |
26 |
8 |
|
7 |
12 |
17 |
4 |
27 |
12 |
|
8 |
4 |
18 |
6 |
28 |
9 |
|
9 |
6 |
19 |
12 |
29 |
6 |
|
10 |
16 |
20 |
3 |
30 |
13 |
- Establish 3σ upper and lower control limits.
- Why can the lower control limit not be a negative number?
- The industry standards for the upper and lower control limits are 0.11 and 0.02, respectively. What does this imply about Royal Bank’s own standards?
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