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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