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Table 2 Experimental design and results of CCD

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

Run

Coded levels

Responses

A

B

C

Actual value (UA/ml)

Predicted value (UA/ml)

1

0

0

0

6.23

8.02

2

1

1

−1

2.52

1.2

3

1.41

0

0

9.98

11.3

4

−1,41

0

0

10.69

9.37

5

0

−1,41

0

15.99

17.31

6

0

0

0

9.17

8.02

7

1

-1

1

13.4

12.08

8

0

0

0

12.27

8.02

9

−1

1

1

27.77

26.45

10

0

0

−1,41

4.8

6.12

11

−1

−1

-1

10.69

9.37

12

0

0

0

5.88

8.02

13

0

1,41

0

9.23

10.55

14

0

0

1,41

6.51

7.83

15

0

0

0

9.22

8.02