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Table 6 Analysis of Variance for SR after dropping insignificant factors and interactions

From: Processing of Al2O3–SiCw–TiC ceramic composite by powder mixed electric discharge grinding

Source DF Seq SS Adj SS Adj MS F P
Regression 15 1.85864 1.85864 0.097823 1151.09 0.000000
Residual error 16 0.0000000 0.0000000 0.0000000   
Lack-of-Fit 11 0.0000000 0.0000000 0.0000000 1.69 0.291328
Pure Error 5 0.0000000 0.0000000 0.0000000   
Total 31 1.85966     
  1. DF Degree of freedom, SS Sum of squares, MS Mean square
  2. R-Sq = 99.95%; R-Sq(pred) = 99.38%; R-Sq(adj) = 99.86%
  3. F > F0.01,15,16
  4. Flack of fit < F0.01,11,16
  5. Model is adequate (F0.01,15,16 = 3.41)
  6. Lack of fit is insignificant (F0.01,11,16 = 3.69)