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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