Table 3.
The results of the ANOVA of the quadratic model.
| Source | Sum of squares | df | Mean square | F value | p-value Prob > F |
|---|---|---|---|---|---|
| Model | 0.15 | 9 | 0.017 | 16.32 | 0.0007 |
| x1 | 0.035 | 1 | 0.035 | 34.53 | 0.0006 |
| x2 | 0.022 | 1 | 0.022 | 21.11 | 0.0025 |
| x3 | 8.450E-003 | 1 | 8.450E-003 | 8.25 | 0.0239 |
| x1x2 | 6.250E-006 | 1 | 6.250E-006 | 6.100E-003 | 0.9399 |
| x1x3 | 9.025E-005 | 1 | 9.025E-005 | 0.088 | 0.7752 |
| x2x3 | 0.013 | 1 | 0.013 | 12.35 | 0.0098 |
| x12 | 0.049 | 1 | 0.049 | 48.31 | 0.0002 |
| x22 | 3.603E-006 | 1 | 3.603E-006 | 3.516E-003 | 0.9544 |
| x32 | 0.019 | 1 | 0.019 | 18.40 | 0.0036 |
| Residual | 7.173E-003 | 7 | 1.025E-003 | ||
| Lack of fit | 5.670E-003 | 3 | 1.890E-003 | 5.03 | 0.0764 |
| Pure error | 1.503E-003 | 4 | 3.758E-004 | ||
| Cor total | 0.16 | 16 | |||
| R2 | 0.9545 | ||||
| R2Adj | 0.8960 |