Table 2.
Analysis of variance (ANOVA) for the fitted quadratic polynomial model.
| Source | DF | SS | MS | F Value | P Level* |
|---|---|---|---|---|---|
| X1 | 1 | 23.4613 | 23.4613 | 34.8866 | 0.0020 |
| X2 | 1 | 24.1513 | 24.1513 | 35.9126 | 0.0019 |
| X3 | 1 | 42.32 | 42.32 | 62.9294 | 0.0005 |
| X1X1 | 1 | 62.4467 | 62.4467 | 92.8576 | 0.0002 |
| X1X2 | 1 | 1.5625 | 1.5625 | 2.3234 | 0.1879 |
| X1X3 | 1 | 0.36 | 0.36 | 0.5353 | 0.4972 |
| X2X2 | 1 | 225.3606 | 225.3606 | 335.1087 | 0.0001 |
| X2X3 | 1 | 2.89 | 2.89 | 4.2974 | 0.0929 |
| X3X3 | 1 | 24.7206 | 24.7206 | 36.7592 | 0.0018 |
| Model | 9 | 377.1535 | 41.9059 | 62.3137 | 0.0001 |
| Error | 5 | 3.3625 | 0.6725 | ||
| Total | 14 | 380.516 |
R2 = 0.9912. DF refers to degrees of freedom; SS refers to sum of sequences; MS refers to mean square.
*
P Level < 0.05 indicates the model terms are significant.