Table 3
Matrix of the central composite design.
| Test | Initial content | Power | Time |
|---|---|---|---|
| 1 | −1 | −1 | −1 |
| 2 | −1 | −1 | +1 |
| 3 | −1 | +1 | −1 |
| 4 | −1 | +1 | +1 |
| 5 | +1 | −1 | −1 |
| 6 | +1 | −1 | +1 |
| 7 | +1 | +1 | −1 |
| 8 | +1 | +1 | +1 |
| 9 | −1.35 | 0 | 0 |
| 10 | +1.35 | 0 | 0 |
| 11 | 0 | −1.35 | 0 |
| 12 | 0 | +1.35 | 0 |
| 13 | 0 | 0 | −1.35 |
| 14 | 0 | 0 | +1.35 |
| 15 | 0 | 0 | 0 |
| 16 | 0 | 0 | 0 |
| 17 | 0 | 0 | 0 |