Table 5 Comparison between predicted and experimental values for response variable of Hordeum vulgare L. extracts at the given condition within the range of optimal conditions
| Predicted value (A) | Experimental value (B) | B/A×100 (%) |
| TPC1) (mg GAE/g) | 3.74 | 3.38 | 90.37 |
| TFC (mg RE/g) | 3 | 2.64 | 88 |
| DPPH (%) | 35.43 | 37.94 | 107.08 |
TPC, total polyphenol content; TFC, total flavonoid content; DPPH, DPPH radical scavenging activity.