| Source | F value | p-value |
| Model | 24.62 | 0.001 |
| Linear | 21.40 | 0.003 |
| Squares | 46.29 | 0.000 |
| 2 factors interaction | 6.19 | 0.039 |
| Inadequation of the adjustment | 0.06 | 0.978 |