Table 8 Anova for response surface quadratic model.

From: Strength enhancement of concrete using incinerated agricultural waste as supplementary cement materials

Source

SS

DF

MS

F Value

Prob > F

Indication

Quadratic model

260.60

5

52.12

69.84

 < 0.0001

Significant

A-BSA

1.14

1

1.14

1.53

0.2557

Not significant

B-curing days

240.12

1

240.12

321.78

 < 0.0001

Significant

AB

2.04

1

2.04

2.74

0.1418

Not significant

A2

13.28

1

13.28

17.80

0.0039

Significant

B2

4.28

1

4.28

5.73

0.0479

Significant

Residual

5.22

7

0.7462

   

Lack of fit

5.22

3

1.74

   

Pure error

0.0000

4

0.000

   
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