Table 12 ANOVA and fit statistics of compressive strength at 56 days.
ANOVA for the Quadratic Model | ||||||
|---|---|---|---|---|---|---|
Source | Sum of Squares | df | Mean square | F-value | p-value | Remarks |
Model | 471.12 | 5 | 94.22 | 105.49 | < 0.0001 | significant |
A- EMS Dosages | 86.87 | 1 | 86.87 | 97.25 | < 0.0001 | significant |
B- RHA Dosages | 6.52 | 1 | 6.52 | 7.30 | 0.0107 | significant |
AB | 3.21 | 1 | 3.21 | 3.60 | 0.0664 | Not significant |
A2 | 5.35 | 1 | 5.35 | 5.99 | 0.0197 | significant |
B2 | 5.56 | 1 | 5.56 | 6.22 | 0.0177 | Significant |
Lack of fit | 4.55 | 6 | 0.75 | 0.82 | 0.58 | Not significant |
Fit Statistics | ||||||
R2 0.93 Remarks: The quadratic Model is significant to proceed with the design. | ||||||
Adjusted R2 0.93 | ||||||
Predicted R2 0.91 | ||||||
Adeq. Precision 26.82. | ||||||
