Table 2.
Analysis of variance for the selected factorial model.
| Total phenolic compounds | Sum of Squares | df | Mean Square | F Value | p-value Prob > F | |
|---|---|---|---|---|---|---|
| Model | 50.75 | 15 | 3.38 | 36.53 | <0.0001 | Significant |
| A-Time | 1.83 | 1 | 1.83 | 19.75 | 0.0002 | |
| B-Temperature | 7.80 | 1 | 7.80 | 84.16 | <0.0001 | |
| C-Ethanol/Water | 32.53 | 1 | 32.53 | 351.19 | <0.0001 | |
| D-Solid/Liquid | 0.054 | 1 | 0.054 | 0.58 | 0.4557 | |
| AB | 4.46 | 1 | 4.46 | 48.17 | <0.0001 | |
| AC | 0.019 | 1 | 0.019 | 0.20 | 0.6590 | |
| AD | 0.16 | 1 | 0.16 | 1.78 | 0.1968 | |
| BC | 0.47 | 1 | 0.47 | 5.11 | 0.0345 | |
| BD | 5.723E-004 | 1 | 5.723E-004 | 6.180E-003 | 0.9381 | |
| CD | 0.32 | 1 | 0.32 | 3.44 | 0.0776 | |
| ABC | 2.49 | 1 | 2.49 | 26.90 | <0.0001 | |
| ABD | 0.032 | 1 | 0.032 | 0.34 | 0.5647 | |
| ACD | 0.049 | 1 | 0.049 | 0.53 | 0.4731 | |
| BCD | 0.20 | 1 | 0.20 | 2.19 | 0.1538 | |
| ABCD | 0.33 | 1 | 0.33 | 3.58 | 0.0725 | |
| Residual | 1.94 | 21 | 0.093 | |||
| Lack of Fit | 0.27 | 1 | 0.27 | 3.29 | 0.0849 | Not significant |
| Pure Error | 1.67 | 20 | 0.084 | |||
| R-Squared | 0.9631 | |||||
| Adj R-Squared | 0.9367 | |||||
| Pred R-Squared | 0.8831 | |||||
| Adeq Precision | 19.667 |