Table 4. ANOVA for the RSM quadratic model 80 % methanolic decoction.
| Sum of squares | Degree of freedom | Mean square | F-value | P-value | |
| Regression (model) | 12.48 | 8 | 1.56 | 5.05 | <0.0025 |
| Residual | 5.25 | 17 | 0.3088 | ||
| Lack of fit | 5.25 | 9 | 0.5833 | 9.721E+05 | 0.0001 |
| Pure error | 4.800E-06 | 8 | 6.00E-07 | ||
| Corrected total | 17.73 | 25 | |||
| R2=0.7039; adjusted R2=0.5646; CV=25.36 % | |||||