| Runs |
| Actual values for variables | Removal efficiency % | ||||
| Standard Order | Run order | A: Time (min) | B: Dye concentration (mg/L) | C: pH | Y |
| |
| 20 | 1 | 80 | 65 | 5 | 90.5 | 90.9 | |
| 12 | 2 | 80 | 124 | 5 | 92.3 | 92.4 | |
| 14 | 3 | 80 | 65 | 8.36 | 94.6 | 94.7 | |
| 15 | 4 | 80 | 65 | 5 | 90.5 | 90.9 | |
| 2 | 5 | 120 | 30 | 3 | 84.2 | 84.2 | |
| 18 | 6 | 80 | 65 | 5 | 90.6 | 90.9 | |
| 7 | 7 | 40 | 100 | 7 | 90.5 | 90.2 | |
| 3 | 8 | 40 | 100 | 3 | 75.9 | 75.7 | |
| 9 | 9 | 13 | 65 | 5 | 79.4 | 80.0 | |
| 4 | 10 | 120 | 100 | 3 | 84.4 | 84.4 | |
| 8 | 11 | 120 | 100 | 7 | 96.5 | 96.7 | |
| 13 | 12 | 80 | 65 | 1.64 | 71.7 | 71.9 | |
| 6 | 13 | 120 | 30 | 7 | 96.8 | 96.8 | |
| 10 | 14 | 147 | 65 | 5 | 91.6 | 91.3 | |
| 16 | 15 | 80 | 65 | 5 | 91.4 | 90.9 | |
| 19 | 16 | 80 | 65 | 5 | 90.9 | 90.9 | |
| 17 | 17 | 80 | 65 | 5 | 91.3 | 90.9 | |
| 5 | 18 | 40 | 30 | 7 | 92.3 | 92.0 | |
| 1 | 19 | 40 | 30 | 3 | 77.8 | 77.3 | |
| 11 | 20 | 80 | 6 | 5 | 93.5 | 93.8 | |