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Table 2 ANOVA for quadratic model

From: Enhanced xylitol production using non-detoxified xylose rich pre-hydrolysate from sugarcane bagasse by newly isolated Pichia fermentans

Source DF Seq SS Adj SS Adj MS F value p value
Regression 14 3685.87 3685.87 263.28 77.1 0
Linear 4 778.17 778.17 194.54 56.97 0
X1 1 587.02 587.02 587.02 171.9 0
X2 1 120.4 120.4 120.4 35.26 0
X3 1 65.19 65.19 65.19 19.09 0.001
X4 1 5.56 5.56 5.56 1.63 0.223
Square 4 2179.18 2179.18 544.79 159.54 0
X1 * X1 1 158.66 0.58 0.58 0.17 0.685
X2 * X2 1 1106.41 1532.83 1532.83 448.87 0
X3 * X3 1 698.9 825.68 825.68 241.79 0
X4 * X4 1 215.2 215.2 215.2 63.02 0
Interaction 6 728.52 728.52 121.42 35.56 0
X1 * X2 1 12.53 12.53 12.53 3.67 0.076
X1 * X3 1 350.25 350.25 350.25 102.57 0
X1 * X4 1 359.1 359.1 359.1 105.16 0
X2 * X3 1 0.02 0.02 0.02 0.01 0.936
X2 * X4 1 3.22 3.22 3.22 0.94 0.348
X3 * X4 1 3.39 3.39 3.39 0.99 0.336
Residual error 14 47.81 47.81 3.41   
Lack-of-fit 10 33.28 33.28 3.33 0.92 0.588
Pure error 4 14.53 14.53 3.63   
Total 28 3733.67     
  1. DF = Degree of freedom; Seq SS = sequential sum of square; Adj SS = adjusted sum of square; Adj MS = adjusted mean square; F = variance ratio (Fisher F-value); p = probability value