Table 4.
ANOVA for reduced quadratic model.
| Source | Sum of squares | df | Mean square | F-value | P-value |
|---|---|---|---|---|---|
| Model | 2869.41 | 9 | 318.82 | 173.42 | < 0.001 |
| A-pressure | 189.35 | 1 | 189.35 | 102.99 | < 0.001 |
| B-temperature | 109.45 | 1 | 109.45 | 59.53 | 0.001 |
| C-time | 1673.02 | 1 | 1673.02 | 910.00 | < 0.001 |
| AB | 16.61 | 1 | 16.61 | 9.03 | 0.198 |
| AC | 155.17 | 1 | 15.17 | 8.25 | 0.024 |
| BC | 132.71 | 1 | 132.71 | 72.18 | < 0.001 |
| A2 | 25.89 | 1 | 25.89 | 14.08 | 0.007 |
| B2 | 32.70 | 1 | 32.70 | 17.79 | 0.004 |
| C2 | 636.70 | 1 | 636.70 | 346.32 | < .0001 |
| Residual | 12.87 | 7 | 1.84 | – | – |
| Lack of fit | 8.02 | 3 | 2.67 | 2.20 | 0.230 |
| Pure error | 4.85 | 4 | 1.21 | – | – |
| Cor total | 2882.28 | 16 | – | – | |
| R2 = 0.9955 | R2adj = 0.9898 |