Each value represents the number of mistakes (defects) found ona student loan application. Values for 50 consecutive loanapplications are given. Calculate the appropriate centerline and3-sigma control limits for the c-chart, and then plot the data andcreate a control chart. Does the process appear to be in a state ofstatistical control? Why or why not?
Upper control limit (UCL) =
Centerline (CL) =
Lower control limit (LCL) =
Process in statistical control?
Expense Report Auditing
| Week | Number of Reports Reviewed | Reports Non-conforming | Proportion Non-conforming |
| 4-Nov | 30 | 8 | 0.267 |
| 11-Nov | 30 | 6 | 0.200 |
| 18-Nov | 30 | 9 | 0.300 |
| 25-Nov | 30 | 7 | 0.233 |
| 2-Dec | 30 | 4 | 0.133 |
| 9-Dec | 30 | 10 | 0.333 |
| 16-Dec | 30 | 7 | 0.233 |
| 23-Dec | 30 | 7 | 0.233 |
| 30-Dec | 30 | 7 | 0.233 |
| 6-Jan | 30 | 7 | 0.233 |
| 13-Jan | 30 | 8 | 0.267 |
| 20-Jan | 30 | 11 | 0.367 |
| 27-Jan | 30 | 9 | 0.300 |
| 3-Feb | 30 | 8 | 0.267 |
| 10-Feb | 30 | 4 | 0.133 |
| 17-Feb | 30 | 6 | 0.200 |
| 24-Feb | 30 | 8 | 0.267 |
| 3-Mar | 30 | 8 | 0.267 |
| 10-Mar | 30 | 8 | 0.267 |
| 17-Mar | 30 | 4 | 0.133 |
