Table 4.
Predicted values for the response variables.
| Response variables | X 1 | X 2 | X 3 | X 4 | Predicted values |
|---|---|---|---|---|---|
| Yield of extraction (%) | 48.80 | 74.29 | 25.09 | 3.04 | 40.84 |
| Total polyphenol content (%) | 50.11 | 72.06 | 22.73 | 2.93 | 48.44 |
| PTP-1B inhibition rate (%) | 52.10 | 73.80 | 21.84 | 2.95 | 86.21 |
| α-glucosidase inhibition rate (%) | 47.57 | 69.74 | 22.22 | 3.03 | 96.56 |
| ABTS inhibition rate (%) | 52.70 | 71.50 | 22.38 | 3.01 | 77.68 |
X 1, ethanol concentration (%); X2, temperature (°C); X3, sample-to-solvent ratio (w/v); X4, extraction time (h).