Table 7 Analysis of variance for quadratic model (R 2 = 0.918; adjusted R 2 = 0.856)
Source | Sum of squares | Degrees of freedom | Mean square | F-value | Probe >F |
|---|---|---|---|---|---|
Model | 12,503.40 | 5 | 2,500.68 | 11.25 | 0.009 |
Residual | 1,110.85 | 5 | 222.17 | ||
Lack-of-fit | 2,744.44 | 5 | 548.88 | 34.68 | 0.028 |
Pure error | 31.65 | 2 | 15.82 | ||
Total | 13,614.24 |