Table 4.
Analysis of variance (ANOVA) for the fitted quadratic polynomial model.
| Source | Sum of squares | DF | Mean Square | F Value | P Value |
|---|---|---|---|---|---|
| X1 | 2.53 | 1 | 2.53 | 0.63 | 0.4532 |
| X2 | 23.80 | 1 | 23.80 | 5.93 | 0.0451 |
| X3 | 0.36 | 1 | 0.36 | 0.090 | 0.7729 |
| X1X2 | 8.70 | 1 | 8.70 | 2.17 | 0.1844 |
| X1X3 | 16.00 | 1 | 16.00 | 3.99 | 0.0860 |
| X2X3 | 9.30 | 1 | 9.30 | 2.32 | 0.1717 |
| X1X1 | 437.63 | 1 | 437.63 | 109.04 | 0.0001 |
| X2X2 | 59.84 | 1 | 59.84 | 14.91 | 0.0062 |
| X3X3 | 85.07 | 1 | 85.07 | 21.20 | 0.0025 |
| Model | 694.31 | 9 | 77.15 | 19.22 | 0.0004 |
| Error | 0.37 | 4 | 0.093 | ||
| Total | 722.40 | 16 |
P Value < 0.05 indicates the model terms are significant.