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Table 5 Analysis of variance and lack-of-fit tests for the response surface models

From: Medium optimization to analyze the protein composition of Bacillus pumilus HR10 antagonizing Sphaeropsis sapinea

Source

Explained sum of squares

DF

Mean square

F -value

P -value

Model

461.94

9

51.33

70.10

 < 0.0001

B: Corn flour

18.61

1

18.61

25.41

0.0015

C: Beef extract

49.00

1

49.00

66.93

 < 0.0001

E: MgSO4

38.72

1

38.72

52.89

0.0002

B × C

5.06

1

5.06

6.91

0.0339

B × E

60.06

1

60.06

82.04

 < 0.0001

C × E

57.00

1

57.00

77.86

 < 0.0001

B2

54.19

1

54.19

74.02

 < 0.0001

C2

20.15

1

20.15

27.52

0.0012

E2

138.61

1

138.61

189.32

 < 0.0001

Residual error Residual

5.12

7

0.7321

  

Lack of fit

3.58

3

1.19

3.10

0.1512

Pure error

1.54

4

0.3850

  

Cor total

467.06

16

   
  1. R2 = 0.9890, Adj R2 = 0.9749, Predicted R2 = 0.8720