Table 2.
Analysis of variance (ANOVA) for the quadratic response surface model.
| Source | Degrees of Freedom | Sum of Squares | Mean Square | F-value | p-value Prob > F |
|---|---|---|---|---|---|
| Model | 9 | 26.15 | 2.91 | 65.53 | <0.0001 |
| A | 1 | 3.51 | 3.51 | 79.23 | <0.0001 |
| B | 1 | 3.15 | 3.15 | 70.95 | <0.0001 |
| C | 1 | 0.12 | 0.12 | 2.79 | 0.1386 |
| AB | 1 | 2.91 | 2.91 | 65.66 | <0.0001 |
| AC | 1 | 0.18 | 0.18 | 3.97 | 0.0865 |
| BC | 1 | 0.22 | 0.22 | 5.06 | 0.0595 |
| A2 | 1 | 5.53 | 5.53 | 124.76 | <0.0001 |
| B2 | 1 | 9.23 | 9.23 | 208.24 | <0.0001 |
| C2 | 1 | 1.00 | 1.00 | 22.57 | 0.0021 |
| Residual | 7 | 0.31 | 0.044 | ||
| Lack of fit | 3 | 0.22 | 0.074 | 3.33 | 0.1376 |
| Pure Error | 4 | 0.089 | 0.022 | ||
| Cor total | 16 | 26.46 |