Table 3.
Predicted models and statistical parameters calculated after implementation of three-factor central composite design.
| Measured parameters | Predicted models | R 2 | R 2 (adjusted) | Regression (P value) | Lack of fit (P value) |
|---|---|---|---|---|---|
| TF | +1.26 + 0.36X
1 + 0.095X
2 + 0.057X
3 + 0.018X
1
X
2 + 0.023X
1
X
3
+ 0.023X 2 X 3 − 0.16X 1 2 + 0.021X 2 2 + 0.00938X 3 2 |
0.98 | 0.97 | 0.0001 | 0.366 |
|
| |||||
| TP | +5.92 + 1.15X
1 + 0.12X
2 + 0.097X
3 + 0.030X
1
X
2 + 0.038X
1
X
3
+ 0.040X 2 X 3 − 0.76X 1 2 + 0.026X 2 2 − 0.10X 3 2 |
0.99 | 0.99 | 0.0001 | 0.295 |
|
| |||||
| DPPH | +74.46 + 14.19X
1 + 2.20X
2 + 1.20X
3 + 1.18X
1
X
2 + 0.40X
1
X
3
+ 0.40X 2 X 3 − 6.89X 1 2 + 1.05X 2 2 − 0.82X 3 2 |
0.99 | 0.99 | 0.0001 | 0.266 |