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Table 3 Regression analysis of CCD

From: Optimization of xylanase production by Streptomyces sp. P12-137 using response surface methodology and central composite design

Source

Mean square

F-value

Prob > F

Model

50.03

5.43

0.0385

A-wheat bran

0.25

0.027

0.8749

B-KNO3

22.85

2.48

0.1762

C-xylose

1.46

0.16

0.7068

AB

81.53

8.85

0.031

AC

31.05

3.37

0.1259

BC

57.96

6.29

0.054

A2

25.46

2.76

0.1574

B2

67.33

7.31

0.0426

C2

2.11

0.23

0.6522

Lack-of-fit

18.89

2.78

0.1708