Analysis of variance of the experimental results of the BBD.
| Variables | Sum of squares | DF | Mean square | F value | P value |
|---|---|---|---|---|---|
| Model | 27.51 | 9 | 3.06 | 69.92 | <0.0001 |
| X 1 | 0.012 | 1 | 0.012 | 0.27 | 0.6163 |
| X 2 | 0.31 | 1 | 0.31 | 7.05 | 0.0327 |
| X 3 | 1.07 | 1 | 1.07 | 24.55 | 0.0016 |
| X 1 X 2 | 0.018 | 1 | 0.018 | 0.42 | 0.5391 |
| X 1 X 3 | 0.27 | 1 | 0.27 | 6.19 | 0.0418 |
| X 2 X 3 | 5.59 | 1 | 5.59 | 127.95 | <0.0001 |
| X 1 2 | 3.20 | 1 | 3.20 | 73.20 | <0.0001 |
| X 2 2 | 3.56 | 1 | 3.56 | 81.39 | <0.0001 |
| X 3 2 | 11.59 | 1 | 11.59 | 265.17 | <0.0001 |
| Residual | 0.31 | 7 | 0.044 | ||
| Lack of fit | 0.081 | 3 | 0.027 | 0.48 | 0.7148 |
| Pure error | 0.23 | 4 | 0.056 |