Table 4 ANOVA for dependent variable: dried biomass.

From: Medium optimization to improve growth and iron uptake by Bacillus tequilensis ASFS1 using fractional factorial designs

Source of variation

Sum of square

df

Mean of square

F value

P > F

Model

4.09

4

1.02

8.57

0.0013

X1

1.96

1

1.96

16.42

0.0014

X2

0.36

1

0.36

3.02

0.1061

X5

1.21

1

1.21

10.14

0.0072

X1 X2

0.56

1

0.56

4.71

0.0490

Curvature

0.22

1

0.22

1.85

0.1966

Residual

1.55

13

0.12

  

Lack of Fit

1.54

11

0.14

42.14

0.0234

Pure Error

6.667E-003

2

3.333E-003

  

Cor Total

5.87

18

   
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