| Source | Sum of squares | Mean square | F-value | Prob > F |
| Model | 0.67 | 0.13 | 176.96 | <0.0001 |
| A | 0.38 | 0.38 | 501.21 | <0.0001 |
| B | 0.25 | 0.25 | 324.58 | <0.0001 |
| A² | 0.01 | 0.01 | 12.83 | 0.0090 |
| B² | 0.01 | 0.01 | 12.83 | 0.0090 |
| AB | 0.02 | 0.02 | 29.51 | 0.0010 |