Source Sum of squares Degree offreedom Mean square F-value Prob> F Remarks
Model 154.77 9 17.2 6.08 0.0047 Significant
A 16.26 1 16.26 5.75 0.0375  
B 0.18 1 0.18 0.062 0.808  
C 82.02 1 82.02 28.99 0.0003  
A2 7.75 1 7.75 2.74 0.1289  
B2 15.28 1 15.28 5.4 0.0425  
C2 21.92 1 21.92 7.75 0.0193  
AB 1.83 1 1.83 0.65 0.4399  
AC 4.16 1 4.16 1.47 0.2533  
BC 13.57 1 13.57 4.8 0.0533  
Residual 28.29 10 2.83      
Lack of Fit 23.01 5 4.6 4.35 0.0661 Not significant
Pure Error 5.28 5 1.06      
Cor Total 183.06 19        
Std. Dev.=1.68,R-Squared=0.8455,Mean=93.52,Adj R-Squared=0.7064,C.V.=1.80,Pred R
Table 3b: Analysis of variance for response surface reduced quadratic model terms.