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Table 5 ANOVA results of the Box–Behnken design

From: Novel optimization strategy for tannase production through a modified solid-state fermentation system

Source

Sum of squares

Degree of freedom

Mean square

F value

P value

P > F

Model

310.99

14

22.21

45.43

< 0.0001

A

29.31

1

29.31

59.95

< 0.0001

B

159.67

1

159.67

326.56

< 0.0001

C

1.752E−003

1

1.752E−003

3.583E−003

0.9531

D

28.23

1

28.23

57.73

< 0.0001

AB

4.05

1

4.05

8.28

0.0122

AC

0.83

1

0.83

1.70

0.2129

AD

0.96

1

0.96

1.96

0.1828

BC

0.15

1

0.15

0.31

0.5858

BD

0.28

1

0.28

0.56

0.4652

CD

0.096

1

0.096

0.20

0.6643

A 2

42.89

1

42.89

87.72

< 0.0001

B 2

53.45

1

53.45

109.31

< 0.0001

C 2

16.29

1

16.29

33.32

< 0.0001

D 2

16.31

1

16.31

33.36

< 0.0001

Residual

6.85

14

0.49

  

Lack of fit

6.21

10

0.62

3.93

0.0994

Pure error

0.63

4

0.16

  

Cor total

317.84

28

   

Std. dev.

0.70

R 2

0.9785

  

Mean

9.81

Adj R2

0.9569

  

C.V. (%)

7.13

Pred R2

0.8843

  

PRESS

36.78

Adeq precision

21.227

 Â