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Table 4 Analysis of variance table for RSM-CCD

From: A statistical strategy for optimizing the production of α-galactosidase by a newly isolated Aspergillus niger NRC114 and assessing its efficacy in improving soymilk properties

Source

Sum of squares

df

Mean square

F-value

p-value (prob > F)

Model

581.1992

14

41.51423

13.11533

< 0.0001

A—pH value

33.51662

1

33.51662

10.5887

0.0053

B—Mannose conc.

134.8032

1

134.8032

42.58754

< 0.0001

C—Meat extract conc.

119.2925

1

119.2925

37.68734

< 0.0001

D—Incubation time

183.5619

1

183.5619

57.99156

< 0.0001

AB

1.352597

1

1.352597

0.427317

0.5232

AC

5.675014

1

5.675014

1.792872

0.2005

AD

13.98608

1

13.98608

4.418535

0.0529

BC

14.70656

1

14.70656

4.646151

0.0478

BD

28.32565

1

28.32565

8.948746

0.0091

CD

25.02249

1

25.02249

7.905199

0.0131

A2

5.970958

1

5.970958

1.886368

0.1898

B2

1.022902

1

1.022902

0.323159

0.5781

C2

17.43682

1

17.43682

5.508706

0.0331

D2

0.643106

1

0.643106

0.203172

0.6586

Residual

47.47981

15

3.16532

  

Lack of fit

45.21154

10

4.521154

9.966101

0.0102

Pure error

2.268266

5

0.453653

  

Cor total

628.6791

29

   
  1. Std. dev., 1.78; R-squared, 0.924; adj R-squared, 0.854; C.V.%, 11.932; adeq precision, 14.014