Table 4.
Analysis of variance (ANOVA) for the fitted quadratic polynomial model for optimization of extraction parameters.
| Berberine r2 = 0.9720; radj2 = 0.9359; rpr2 = 0.7850 |
RSA (IC50) r2 = 0.9740; radj2 = 0.9406; rpr2 = 0.9034 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Source | SS | df | MS | F-Value | p-Value | SS | df | MS | F-Value | p-Value |
| Model | 10834.44 | 9 | 1203.83 | 26.957 | 0.0001 | 4.35 × 10−7 | 9 | 4.84 × 10−8 | 29.17 | <0.0001 |
| Lack of fit | 132.178 | 3 | 44.06 | 0.977 | 0.4870 | 1.74 × 10−9 | 3 | 5.79 × 1010 | 0.23 | 0.8683 |
| Pure error | 180.436 | 4 | 45.11 | 9.87 × 10−9 | 4 | 2.47 × 10−9 | ||||
radj2 = adjusted r2; rpr2 = predicted r2; RSA = radical scavenging activity; SS = sum of squares; df = degrees of freedom; MS = mean square.