Table 9 Significance verification of surface roughness regression model
From: Research on Surface Roughness of Supersonic Vibration Auxiliary Side Milling for Titanium Alloy
Source of variance | Sum of square | Degree of freedom | Mean square | F value | P value |
|---|---|---|---|---|---|
Regression model | 1.27 | 9 | 0.14 | 25.99 | ≤ 0.0001 |
Residual | 0.038 | 7 | 5.441×10−3 | ||
Lack of fit | 0.024 | 3 | 8.100×10−3 | 2.35 | 0.2137 |
Pure error | 0.014 | 4 | 3.447×10−3 | ||
Sum | 1.31 | 16 |