Table 6.
Analysis of variance showing effects of treatment variables as linear or quadratic terms and interaction effects on response variables of total dietary fiber.
| Source | Degree of freedom | Fine fraction | Coarse fraction |
| F value | Prov>F | F value | Prov>F |
| Model | 9 | 10.38 | <0.0001 | 8.43 | <0.0001 |
| Liner | 3 | 25.24 | <0.0001 | 21.80 | <0.0001 |
| Quadratic | 3 | 3.07 | 0.0560 | 2.78 | 0.0727 |
| Cross | 3 | 2.84 | 0.0691 | 0.72 | 0.5541 |
| R2 | 0.8461 | 0.8170 |
| X11) | 4 | 15.03 | <0.0001 | 7.18 | 0.0014 |
| X22) | 4 | 2.27 | 0.1045 | 7.52 | 0.0011 |
| X33) | 4 | 8.19 | 0.0007 | 4.81 | 0.0089 |
X1: Mill grinding speed (rpm)
X2: Separate reverse wheel speed (rpm)
X3: Air classification reverse wheel speed (rpm)