Analysis of variance (ANOVA) for the BBD.
| Source | SS | D f | MS | F-Value | P-Value | Status |
|---|---|---|---|---|---|---|
| Model | 632.08 | 9 | 70.23 | 66.89 | <0.0001 | Significant |
| A – pH | 3.13 | 1 | 3.13 | 2.98 | <0.0001 | Significant |
| B – NaCl | 12.378 | 1 | 378.12 | 360.12 | 0.1451 | Significant |
| C – extraction time | 0.32 | 1 | 32.0 | 30.48 | 0.0027 | Significant |
| AB | 25.6 | 1 | 6.25 | 5.95 | 0.0587 | Significant |
| AC | 4.00 | 1 | 4.0 | 3.81 | 0.01084 | |
| BC | 1.00 | 1 | 1.00 | 0.95 | 0.3799 | Significant |
| A 2 | 174.52 | 1 | 174.52 | 166.21 | <0.0001 | Significant |
| B 2 | 42.06 | 1 | 42.06 | 40.05 | 0.0015 | Significant |
| C 2 | 9.75 | 1 | 9.75 | 9.29 | 0.0285 | Significant |
| Residual error | 5.25 | 5 | 1.05 | |||
| Lack-of-fit | 3.25 | 3 | 1.08 | 1.08 | 0.5129 | Not significant |
| Pure error | 2.00 | 2 | 1.00 | |||
| Total | 637.33 | 14 | ||||
| R-squared | 0.991 | |||||
| R-adjusted | 0.976 |