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Table 4 ANOVA for response surface quadratic model for protein production

From: Optimization of protein production by Micrococcus luteus for exploring pollutant-degrading uncultured bacteria

Factors

Statistics

Sum of squares

df

Mean square

F-value

P-value

Model

1075.47

14

76.82

30.11

< 0.0001

X3

2.88

1

2.88

1.13

0.3051

X4

29.42

1

29.42

11.53

0.0040

X8

227.79

1

227.79

89.29

< 0.0001

X9

552.46

1

552.46

216.56

< 0.0001

X3 X4

0.10

1

0.10

0.038

0.8475

X3 X8

10.90

1

10.90

4.27

0.0565

X3 X9

0.27

1

0.27

0.10

0.7507

X4 X8

0.15

1

0.15

0.06

0.8147

X4 X9

0.64

1

0.645

0.25

0.6225

X8 X9

8.43

1

8.43

3.30

0.0892

X 3 2

42.09

1

42.09

16.50

0.0010

X 4 2

53.19

1

53.19

20.85

0.0004

X 8 2

87.85

1

87.85

34.44

< 0.0001

X 9 2

150.01

1

150.01

58.80

< 0.0001

Residual

38.27

15

2.55

  

Pure error

0.51

5

0.10

  

Cor total

1113.73

29

   
  1. Coefficient of determination (R2 = 0.966), R2(predict) = 0.804, R2(adjust) = 0.934.