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Experimental design with independent variable values
| Level | Molar ratio (ethanol/oil) | Temperature (ºC) | Catalyst (%) | Time (h) |
|---|---|---|---|---|
| − 1 | 6 | 65 | 1 | 1 |
| 0 | 7 | 70 | 1.5 | 2 |
| 1 | 8 | 75 | 2 | 3 |
| Run order | Std. order | Molar ratio (ethanol/oil) | Temperature (ºC) | Catalyst (%) | Time (h) |
|---|---|---|---|---|---|
| 1 | 8 | 8 | 75 | 2 | 1 |
| 2 | 6 | 8 | 65 | 2 | 3 |
| 3 | 4 | 8 | 75 | 1 | 3 |
| 4 | 5 | 6 | 65 | 2 | 1 |
| 5 | 2 | 8 | 65 | 1 | 1 |
| 6 | 3 | 6 | 75 | 1 | 1 |
| 7 | 9 | 7 | 70 | 1.5 | 2 |
| 8 | 7 | 6 | 75 | 2 | 3 |
| 9 | 1 | 6 | 65 | 1 | 3 |
