Table 2. Coded levels and real values (in parentheses) for the experimental design and results of CCD.

Trial

Powered soy (%)
x₁(X₁)^a

KH₂PO₄ (%)
x₂(X₂)

MgSO₄ (%)
x₃(X₃)

Peptone (%)
x₄(X₄)

MTGase (U/ml) 120 hrs

Experimental

Predicted

1

-1 (1.5)

-1 (0.2)

-1 (0.1)

-1 (0.5)

0.87

0.78

2

1 (3.5)

-1 (0.2)

-1 (0.1)

-1 (0.5)

0.74

0.71

3

-1 (1.5)

1(0.6)

-1 (0.1)

-1 (0.5)

0.51

0.57

4

1 (3.5)

1(0.6)

-1 (0.1)

-1 (0.5)

0.99

0.93

5

-1 (1.5)

-1 (0.2)

1 (0.3)

-1 (0.5)

0.67

0.86

6

1 (3.5)

-1 (0.2)

1 (0.3)

-1 (0.5)

0.72

0.79

7

-1 (1.5)

1(0.6)

1 (0.3)

-1 (0.5)

0.81

0.64

8

1 (3.5)

1(0.6)

1 (0.3)

-1 (0.5)

1.01

1.00

9

-1 (1.5)

-1 (0.2)

-1 (0.1)

1 (1.5)

1.33

1.05

10

1 (3.5)

-1 (0.2)

-1 (0.1)

1 (1.5)

0.70

0.69

11

-1 (1.5)

1(0.6)

-1 (0.1)

1 (1.5)

0.82

0.83

12

1 (3.5)

1(0.6)

-1 (0.1)

1 (1.5)

0.78

0.90

13

-1 (1.5)

-1 (0.2)

1 (0.3)

1 (1.5)

0.36

0.50

14

1 (3.5)

-1 (0.2)

1 (0.3)

1 (1.5)

0.23

0.14

15

-1 (1.5)

1(0.6)

1 (0.3)

1 (1.5)

0.21

0.29

16

1 (3.5)

1(0.6)

1 (0.3)

1 (1.5)

0.44

0.36

17

-2 (0.5)

0 (0.4)

0 (0.2)

0 (1.0)

0.56

0.54

18

2 (4.5)

0 (0.4)

0 (0.2)

0 (1.0)

0.49

0.54

19

0 (2.5)

-2 (0.0)

0 (0.2)

0 (1.0)

0.57

0.71

20

0 (2.5)

2 (0.8)

0 (0.2)

0 (1.0)

0.81

0.71

21

0 (2.5)

0 (0.4)

-2 (0.0)

0 (1.0)

0.90

1.02

22

0 (2.5)

0 (0.4)

2 (0.4)

0 (1.0)

0.65

0.56

23

0 (2.5)

0 (0.4)

0 (0.2)

-2 (0.0)

0.91

0.91

24

0 (2.5)

0 (0.4)

0 (0.2)

2 (2.0)

0.49

0.53

25

0 (2.5)

0 (0.4)

0 (0.2)

0 (1.0)

1.43

1.37

26

0 (2.5)

0 (0.4)

0 (0.2)

0 (1.0)

1.17

1.37

27

0 (2.5)

0 (0.4)

0 (0.2)

0 (1.0)

1.50

1.37