Table 3. ANOVA Table for XFFA at 75 min.
| source | sum of squares | df | mean square | F-value | p-value |
|---|---|---|---|---|---|
| model | 1099.25 | 9 | 122.14 | 23.36 | <0.0001 |
| A—catalyst (wt %) | 590.28 | 1 | 590.28 | 112.89 | <0.0001 |
| B—temperature (°C) | 270.53 | 1 | 270.53 | 51.74 | <0.0001 |
| C—co-solvent (mL/100 g of oil) | 49.05 | 1 | 49.05 | 9.38 | 0.0120 |
| AB | 2.60 | 1 | 2.60 | 0.4973 | 0.4968 |
| AC | 39.15 | 1 | 39.15 | 7.49 | 0.0210 |
| BC | 16.82 | 1 | 16.82 | 3.22 | 0.1032 |
| A2 | 8.55 | 1 | 8.55 | 1.64 | 0.2298 |
| B2 | 48.35 | 1 | 48.35 | 9.25 | 0.0124 |
| C2 | 0.7230 | 1 | 0.7230 | 0.1383 | 0.7178 |
| residual | 52.29 | 10 | 5.23 | ||
| cor total | 1151.53 | 19 | |||
| std. dev. | 2.29 | R2 | 0.9546 | ||
| mean | 66.28 | adjusted R2 | 0.9137 | ||
| CV % | 3.45 | adeq precision | 18.6762 | ||