Table 6 Regression results from data of CCD experiments

Model^a

27,308.59

9

16.25

< 0.0001**

Z₁

517.35

1

−6.15

2.77

0.1199

Z₂

122.28

1

2.99

0.65

0.4329

Z₃

1,509.75

1

−10.51

8.09

0.0138*

Z₁Z₂

21.16

1

1.63

0.11

0.7418

Z₁Z₃

400.30

1

−7.07

2.14

0.1669

Z₂Z₃

26.68

1

1.83

0.14

0.7115

Z ²₁

13,104.72

1

−28.72

70.19

< 0.0001**

Z ²₂

778.95

1

−7.00

4.17

0.0619

Z ²₃

11,074.70

1

−26.40

59.32

< 0.0001**

Residual

2,427.18

13

Lack of fit

357.70

5

0.28

0.9135

Pure Error

2,069.48

8

Total

29,735.77

22