Table 4.
Analysis of variance (ANOVA) of second-order polynomial models for TPH and TFL content and antioxidant activity in A. millefolium extracts.
| Response | Sum of Squares | DF 1 | Mean Square | F-Value | p-Value |
|---|---|---|---|---|---|
| TPH content | |||||
| Model | 4854.44 | 9 | 539.38 | 5.26 | 0.0411 |
| Residual | 512.94 | 5 | 102.59 | ||
| Lack of fit | 441.96 | 3 | 147.32 | 4.15 | 0.2002 |
| Pure error | 70.97 | 2 | 35.49 | ||
| Total | 5367.37 | 14 | |||
| TFL content | |||||
| Model | 3352.65 | 9 | 372.52 | 12.12 | 0.0067 |
| Residual | 153.72 | 5 | 30.74 | ||
| Lack of fit | 147.08 | 3 | 49.03 | 14.78 | 0.0640 |
| Pure error | 6.63 | 2 | 3.32 | ||
| Total | 3506.37 | 14 | |||
| ABTS | |||||
| Model | 1.141 × 106 | 9 | 1.267 × 105 | 6.18 | 0.0295 |
| Residual | 1.026 × 106 | 5 | 20,518.99 | ||
| Lack of fit | 97,378.83 | 3 | 32,459.61 | 12.45 | 0.0753 |
| Pure error | 5216.13 | 2 | 2608.07 | ||
| Total | 1.243 ×106 | 14 |
1 Degrees of freedom.