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Table 5 Sequential Model Sum of Squares- Surface roughness

From: Impact of nose radius and machining parameters on surface roughness, tool wear and tool life during turning of AA7075/SiC composites for green manufacturing

Source Sum of Squares DF Mean Square F Value Prob > F  
Mean 273.42 1 273.42    
Linear 7.07 4 1.77 21.43 <  0.0001  
2FI 0.49 6 0.081 0.98 0.4655  
Quadratic 1.36 4 0.34 24.49 <  0.0001 Suggested
Cubic 0.16 8 0.019 2.56 0.1168 Aliased
Residual 0.053 7 7.612E-003    
Total 282.55 30 9.42