Table 4.
Experimental coding for factor and level.
| Factor and Level | X1/Liquid to Solid Ratio (v/w) | X2/Temperature (°C) | X3/Time (min) |
|---|---|---|---|
| +1.682 | 12 | 85 | 150 |
| +1 | 11.2 | 81 | 138 |
| 0 | 10 | 75 | 120 |
| −1 | 8.8 | 69 | 102 |
| −1.682 | 8 | 65 | 90 |
| Δj | 1.2 | 6 | 18 |
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