Table 3.
Parameters of the polynomial models representing the studied responses (Y1-Y3).
| Model | Y1 | Y2 | Y3 | |||
|---|---|---|---|---|---|---|
| Model parameters | Coefficient | P value | Coefficient | P value | Coefficient | P value |
|
| ||||||
| b0 | 32.524 | ∗∗∗ | 77.720 | ∗∗∗ | 4.937 | ∗∗∗ |
|
| ||||||
| b1 | 3.911 | ∗∗∗ | 8.227 | ∗∗∗ | 1.702 | ∗∗∗ |
|
| ||||||
| b2 | 0.224 | n.s | -0.503 | n.s | 0.195 | n.s |
|
| ||||||
| b11 | -0.161 | n.s | -1.976 | n.s | 0.446 | n.s |
|
| ||||||
| b22 | 0.032 | n.s | 0.277 | n.s | 0.738 | ∗ |
|
| ||||||
| b12 | -0.442 | n.s | 2.508 | n.s | -0.562 | n.s |
|
| ||||||
| Model validation | ||||||
|
| ||||||
| Significance level (%) | ∗∗∗ | ∗∗∗ | ∗∗∗ | |||
|
| ||||||
| Df | 13 | 13 | 13 | |||
|
| ||||||
| Sum of squares | 1.28E+02 | 9.16E+02 | 42.341 | |||
|
| ||||||
| Mean square | 24.04 | 1.66E+02 | 7.673 | |||
|
| ||||||
| R 2 | 0.949 | 0.910 | 0.902 | |||
|
| ||||||
| Adjusted R 2 | 0.918 | 0.854 | 0.847 | |||
∗∗∗: Significant at the level 99.9%
∗∗: Significant at the level 99%
∗: Significant at the level 95%
n.s: not significant
Df: degrees of freedom.