Research Article
Optimization of Ultrasound-Assisted Extraction of Total Flavonoids from Dendranthema indicum var. aromaticum by Response Surface Methodology
Table 3
Sequential model sum of squares.
| Source | Sum of squares | Degree of freedom | Mean square | F-value | Prob. > F | |
| Mean | 2.57 | 1 | 2.57 | | | | Linear | 0.05 | 3 | 1.63E − 02 | 24.51 | <0.0001 | | 2FI | 4.16E − 04 | 3 | 1.39E − 04 | 0.18 | 0.91 | | Quadratic | 9.11E − 03 | 3 | 3.04E − 03 | 27.48 | <0.0001 | Suggested | Cubic | 6.76E − 04 | 4 | 1.69E − 04 | 2.36 | 0.17 | Biased | Residual | 4.29E − 04 | 6 | 7.15E − 05 | | | | Total | 2.63 | 20 | 0.13 | | | |
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