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. 2021 Jul 21;11:14870. doi: 10.1038/s41598-021-94430-y

Table 3.

Predicted and actual values for optimal conditions.

Response Actaual value Predicted value % Error
Yield (%) 7.6 ± 0.6 7.6 0.6
TPC (mg GAE/g) 198.2 ± 0.7 193.9 2.1
DPPH (%) 91.4 ± 0.6 89.0 2.6
ABTS (mgTrolox/g) 106.4 ± 3.1 106.0 0.4
FRAP (mgTrolox/g) 304.6 ± 5.5 317.9  − 4.3
6-Gingerol (mg/g) 71.5 ± 3.6 71.5 0.1
6-Shogaol (mg/g) 12.5 ± 1.0 12.7  − 2.1
Paradol (mg/g) 23.1 ± 1.1 24.7  − 7.1
Zingerone (mg/g) 5.0 ± 0.3 5.2  − 3.3