Table 3.
Analysis of variance
| ε (mm/mm) | σB (MPa) | E (MPa) | T (MJ/m.3) | ||
|---|---|---|---|---|---|
| Source | DF | F value | |||
| Regression | 9 | 33.75 | 37.06 | 12.30 | 32.83 |
| TiO2% | 1 | 11.85 | 1.04 | 1.04 | 9.52 |
| RDA | 1 | 0.77 | 6.24 | 2.74 | 1.18 |
| NT | 1 | 0.48 | 0.02 | 1.64 | 0.26 |
| TiO2%*TiO2% | 1 | 33.71 | 4.84 | 0.96 | 23.57 |
| RDA*RDA | 1 | 32.43 | 0.95 | 0.02 | 23.12 |
| NT*NT | 1 | 0.36 | 0.03 | 1.70 | 0.19 |
| TiO2%*RDA | 1 | 59.90 | 41.65 | 37.18 | 61.23 |
| TiO2%*NT | 1 | 17.28 | 2.40 | 0.89 | 14.03 |
| RDA*NT | 1 | 0.12 | 6.84 | 3.05 | 0.56 |
| Error | 71 | ||||
| Total | 80 | ||||
| Performance | |||||
| Regression P value | 0.000 | 0.000 | 0.000 | 0.000 | |
| R.2 | 81.06 | 82.45 | 60.93 | 80.63 | |
| R.2 (adj) | 78.65 | 80.22 | 55.98 | 78.17 | |
| R.2 (pred) | 75.37 | 77.55 | 49.70 | 74.91 | |
| Ranking | 2 | 1 | 4 | 3 | |