Table 1 Coded level of independent variables used in central experimental design
From: Optimization and evaluation of multigrain gluten-enriched instant noodles
Independent variables | Symbols | Coded levels | |||||
|---|---|---|---|---|---|---|---|
Actual | Coded | − α | − 1 | 0 | + 1 | + α | |
Sorghum flour (%) | X 1 | x 1 | 10.00 | 18.11 | 30.00 | 41.89 | 50.00 |
Soy flour (%) | X 2 | x 2 | 12.03 | 12.03 | 15.00 | 17.97 | 20.00 |
Gluten content (%) | X 3 | x 3 | 2.00 | 2.41 | 3.00 | 3.59 | 4.00 |