Table 3.
ANOVA of quadratic model.
| Source | Sum of squares | Degree of freedom | Mean square | F-value | P value | Suggestion |
|---|---|---|---|---|---|---|
| Model | 100.24 | 9 | 11.14 | 28.79 | <0.0001 | Significant |
| A | 2.89 | 1 | 2.89 | 7.47 | 0.0211 | — |
| B | 20.30 | 1 | 20.30 | 52.46 | <0.0001 | Significant |
| C | 0.55 | 1 | 0.55 | 1.41 | 0.2623 | — |
| AB | 0.018 | 1 | 0.018 | 0.046 | 0.8346 | — |
| AC | 0.14 | 1 | 0.14 | 0.37 | 0.5590 | — |
| BC | 5.2E − 004 | 1 | 5.2E − 004 | 1.3E − 003 | 0.9715 | — |
| A 2 | 10.30 | 1 | 10.30 | 26.62 | 0.0004 | Significant |
| B 2 | 23.70 | 1 | 23.70 | 61.24 | <0.0001 | Significant |
| C 2 | 54.58 | 1 | 54.58 | 141.06 | <0.0001 | Significant |
| Residual | 3.87 | 10 | 0.39 | |||
| Lack of fit | 2.72 | 5 | 0.54 | 2.35 | 0.1846 | Not significant |
| Pure error | 1.15 | 5 | 0.23 | |||
| Corrected total | 104.11 | 19 | ||||
|
| ||||||
| R-squared | 0.9628 | Standard deviation | 0.62 | |||
| Adjusted R 2 | 0.9294 | Coefficient of variation % | 9.84 | |||
| Predicted R 2 | 0.7793 | PRESS | 22.98 | |||
| Adequate precision | 13.279 | |||||