Table 4 Variance analysis (ANOVA) for the two adjusted models.

From: Design of three-component essential oil extract mixture from Cymbopogon flexuosus, Carum carvi, and Acorus calamus with enhanced antioxidant activity

 

DPPH IC50

ABTS IC50

Model

Freedom degree

Sum of Squares

Mean Square

F Ratio

p-value

Freedom degree

Sum of Squares

Mean Squares

F Ratio

p-value

Regression

6

453,343

75,557.20

19.980

0.0024*

6

900,387

150,064

34.2975

0.0007*

Residuals

5

18,908.22

3781.60

  

5

21,876.92

4375

  

Lack of fit

3

18,753.15

6251.05

18.775

0.0123*

3

21,409.179

7136.39

16.514

0.0319*

Pure error

2

155.059

77.53

  

2

467.737

233.87

  

Total

11

472,251.22

   

11

922,263.91

   

R2

0.97

    

0.98

    

R2 adj

0.88

    

0.95

    

R2 pred

− 19.00

    

0.46

    
  1. *statistically significant, R2 Coefficient of determination, adj Adjusted, pred Predicted.
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