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Analysis of variance (ANOVA) for the quadratic modela
| Source | Sum of squares | Degree of freedom | Mean square | F value | Prob>F | Significance |
| Model | 506.70 | 9 | 56.30 | 14.95 | 0.0001 | Significant |
| Residual (error) | 37.66 | 10 | 3.77 | |||
| Lack of fit | 24.26 | 5 | 4.85 | 1.81 | 0.2652 | Not significant |
| Pure error | 13.40 | 5 | 2.68 | |||
| Total | 544.35 | 19 |
Coefficient of determination (R 2)=0.9308; Adjusted R 2=0.8686; Coefficient of variation (CV)=15.39%; Adeq precision=14.432
