Table 5 Fit summary for FCCCD for biosorption of Pb2+ results.

From: Eco-friendly approach for biosorption of Pb2+ and carcinogenic Congo red dye from binary solution onto sustainable Ulva lactuca biomass

Lack of Fit Tests

Source

Sum of Squares

df

Mean Square

F-value

P-value

Prob > F

Linear

832.65

37

22.50

9.86

0.0021*

2FI

541.91

27

20.07

8.79

0.0032*

Quadratic

14.03

22

0.64

0.28

0.9899

Sequential Model Sum of Squares

Source

Sum of Squares

df

Mean Square

F-value

P-value

Prob > F

Linear vs Mean

445.36

5

89.07

4.62

0.0018*

2FI vs Linear

290.74

10

29.07

1.77

0.1044

Quadratic vs 2FI

527.88

5

105.58

102.03

 < 0.0001*

Model Summary Statistics

Source

Standard deviation

R-Squared

Adjusted R-Squared

Predicted R-Squared

PRESS

Linear

4.39

0.3442

0.2696

0.1588

1088.48

2FI

4.05

0.5689

0.3787

0.1495

1100.53

Quadratic

1.02

0.9768

0.9608

0.9474

68.01

  1. “* Significant values, df : degree of freedom, PRESS: sum of squares of prediction error, two factors interaction: 2FI”.
Back to article page