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Table 3 Analysis of variance (ANOVA) for the fitted quadratic model for fenvalerate biodegradation

From: Biodegradation and metabolic pathway of fenvalerate by Citrobacter freundii CD-9

Source Sum of squares Degrees of freedom Mean square F- Value P-Value
Model 2182.22 9 242.47 37.83 < 0.0001
A-pH 365.85 1 365.85 57.09 0.0001
B- Fenvalerate concentration 126.41 1 126.41 19.72 0.0030
C-Inoculum amount 61.05 1 61.05 9.53 0.0177
A  × B 27.56 1 27.56 4.30 0.0768
A  × C 9.61 1 9.61 1.50 0.2603
B  × C 140.42 1 140.42 21.91 0.0023
A2 188.45 1 188.45 29.41 0.0010
B2 524.87 1 524.87 81.90 < 0.0001
C2 595.25 1 595.25 92.88 < 0.0001
Residual 44.86 7 6.41   
Lack of fit 32.45 3 10.82 3.49 0.1294
Pure error 12.41 4 3.10   
Total 2227.08 16    
  1. R2 = 0.9799; adjusted R2 = 0.9540; coefficient of variation = 3.42%; P-Value < 0.05 indicates that the model terms are significant