Table 5 Levels of variables chosen for the experimental design
Symbols | Factors | Actual levels of coded factors | ||
|---|---|---|---|---|
−1.000 | 0.00 | 1.000 | ||
A | Sucrose (%, w/v) | 0.25 | 1.00 | 2.00 |
B | Yeast extract (%, w/v) | 0.25 | 0.50 | 1.25 |
C | Barium chloride (%, w/v) | 0.01 | 0.05 | 0.10 |
D | Inoculum age (h) | 6.00 | 12.00 | 18.00 |
E | Inoculum size (%, v/v) | 1.00 | 2.50 | 10.00 |
F | Time (h) | 6.00 | 18.00 | 24.00 |