U-learn University uses a c-chart to monitor student complaints per week. Complaints have been recorded over the past ten weeks. Develop 3-sigma control limits using the following data:
| Week |
|
Number of Complaints |
| 1 |
|
3 |
| 2 |
|
2 |
| 3 |
|
1 |
| 4 |
|
3 |
| 5 |
|
0 |
| 6 |
|
3 |
| 7 |
|
3 |
| 8 |
|
0 |
| 9 |
|
2 |
| 10 |
|
0 |
(If the lower control limit is negative, round the LCL to zero and all otheranswers to 2 decimal places, e.g. 15.25.)