Table 10 ANOVA results for compressive strength at 14 days.
ANOVA for the Quadratic Model | ||||||
|---|---|---|---|---|---|---|
Source | Sum of Squares | df | Mean square | F-value | p-value | Remarks |
Model | 239.31 | 5 | 53.24 | 97.85 | < 0.0001 | significant |
A- EMS Dosages | 56.27 | 1 | 78.49 | 79.76 | < 0.0001 | significant |
B- RHA Dosages | 1.54 | 1 | 1.54 | 5.97 | 0.1506 | not significant |
AB | 1.73 | 1 | 1.73 | 2.84 | 0.1294 | not significant |
A2 | 1.36 | 1 | 1.36 | 1.61 | 0.1767 | not significant |
B2 | 4.98 | 1 | 4.98 | 9.30 | 0.0131 | significant |
Lack of fit | 0.51 | 6 | 0.08 | 0.12 | 0.9927 | not significant |
Fit Statistics | ||||||
R2 0.92 Remarks: The quadratic Model is significant to proceed with the design. | ||||||
Adjusted R2 0.91 | ||||||
Predicted R2 0.88 | ||||||
Adeq. Precision 23.79. | ||||||
