Coded and real values of independent variables used in the central composite design.
Independent variables (g/l) | Actual levels of coded values | ||||
---|---|---|---|---|---|
-α | -1 | 0 | 1 | α | |
Maltose (X1) | 8.18 | 15 | 25 | 35 | 41.8 |
Yeast extract (X2) | 8.18 | 15 | 25 | 35 | 41.8 |
Soytone (X3) | 4.77 | 15 | 30 | 45 | 55.2 |