Table 2.
Adjustment analysis of the models
| Source | DFa | Sum of squares | F ratio | Prob > F |
|---|---|---|---|---|
| Total anthocyanin content (TAC) | ||||
| Model | 9 | 218.97 | 227.17 | < 0.0001* |
| Error | 5 | 0.54 | ||
| Total model | 14 | 219.51 | ||
| Lack of fit | 3 | 0.47 | 5.11 | 0.168 |
| Pure error | 2 | 0.06 | ||
| Total error | 5 | 0.54 | ||
| R2 | 0.99 | |||
| Adj. R2 | 0.989 | |||
| Antioxidant activity (AA) | ||||
| Model | 9 | 86.58 | 67.81 | < 0.0001* |
| Error | 5 | 0.71 | ||
| Total model | 14 | 87.29 | ||
| Lack of fit | 3 | 0.48 | 1.41 | 0.441 |
| Pure error | 2 | 0.23 | ||
| Total error | 5 | 0.71 | ||
| R2 | 0.99 | |||
| Adj. R2 | 0.996 | |||
aDegrees of freedom
*Value statistically significant at P < 0.05