Table 3.
ANOVA for response surface quadratic model.
| Source | Coefficient estimate | Sum of squares | df | Mean square | F-value | P-value | Remarks |
|---|---|---|---|---|---|---|---|
| Acidified methanolic extraction | |||||||
| Model | 1114.595 | 152059.256 | 9 | 16895.473 | 26.906 | 0.0001 | Significant |
| X 1 | 103.359 | 85464.893 | 1 | 85464.893 | 136.105 | <0.0001 | |
| X 2 | 26.475 | 5607.274 | 1 | 5607.274 | 8.930 | 0.0203 | |
| X 3 | 68.744 | 37805.617 | 1 | 37805.617 | 60.206 | 0.0001 | |
| X 12 | −45.922 | 8435.296 | 1 | 8435.296 | 13.433 | 0.0080 | |
| X 13 | 22.196 | 1970.579 | 1 | 1970.579 | 3.138 | 0.1198 | |
| X 23 | 9.254 | 342.543 | 1 | 342.543 | 0.546 | 0.4842 | |
| X 1 2 | 24.728 | 2574.683 | 1 | 2574.683 | 4.100 | 0.0825 | |
| X 2 2 | −48.608 | 9948.234 | 1 | 9948.234 | 15.843 | 0.0053 | |
| X 3 2 | 11.160 | 524.442 | 1 | 524.442 | 0.835 | 0.3912 | |
| Residual | 4395.537 | 7 | 627.934 | ||||
| Lack of fit | 874.804 | 3 | 291.601 | 0.331 | 0.8045 | Not significant | |
| Pure error | 3520.733 | 4 | 880.183 | ||||
| Cor total | 156454.793 | 16 | |||||
|
| |||||||
| Acidified ethanolic extraction | |||||||
| Model | 664.170 | 162047.676 | 9 | 18005.297 | 16.224 | 0.0007 | Significant |
| X 1 | 118.806 | 112918.450 | 1 | 112918.450 | 101.747 | <0.0001 | |
| X 2 | 57.681 | 26616.436 | 1 | 26616.436 | 23.983 | 0.0018 | |
| X 3 | 31.763 | 8070.915 | 1 | 8070.915 | 7.272 | 0.0308 | |
| X 12 | 7.237 | 209.468 | 1 | 209.468 | 0.189 | 0.6770 | |
| X 13 | −3.966 | 62.917 | 1 | 62.917 | 0.057 | 0.8186 | |
| X 23 | −8.071 | 260.580 | 1 | 260.580 | 0.235 | 0.6428 | |
| X 1 2 | 31.220 | 4103.958 | 1 | 4103.958 | 3.698 | 0.0959 | |
| X 2 2 | −11.849 | 591.175 | 1 | 591.175 | 0.533 | 0.4892 | |
| X 3 2 | −48.100 | 9741.404 | 1 | 9741.404 | 8.778 | 0.0210 | |
| Residual | 7768.593 | 7 | 1109.799 | ||||
| Lack of fit | 6069.165 | 3 | 2023.055 | 4.762 | 0.0829 | Not significant | |
| Pure error | 1699.428 | 4 | 424.857 | ||||
| Cor total | 169816.269 | 16 | |||||