Response 02

BG adsorption

ANOVA for selected factorial model

Source

Sum of

Mean

F

p-value

Squaresdf Square Value Prob > F

Model 407.00

5

81.4

65.12

0.0152

significant

A-Contact Time 72.00

1

72

57.6

0.0169

B-Dosage 180.50

1

180.5

144.4

0.0069

C-pH 98.00

1

98

78.4

0.0125

AC 24.50

1

24.5

19.6

0.0474

BC 32.00

1

32

25.6

0.0369

Residual 2.50

2

1.25

Cor Total 409.50

7

Std. Dev.

1.12

R-Squared

0.9939

Mean 85.25

Adj R-Squared

0.9786

C.V. %

1.31

Pred R-Squared

0.9023

PRESS

40

Adeq Precision

23.238

The “Pred R-Squared” of 0.9023 is in reasonable agreement with the “Adj R-Squared” of 0.9786.

Coefficient

Standard

95% CI

95% CI

Factor Estimate

df

Error

Low

High

VIF

Intercept 85.25

1

0.4

83.55

86.95

A-Contact Time 3.00

1

0.4

1.3

4.7

1

B-Dosage 4.75

1

0.4

3.05

6.45

1

C-pH 3.50

1

0.4

1.8

5.2

1

AC-1.75

1

0.4

−3.45

−0.049

1

BC 2.00

1

0.4

0.3

3.7

1