Table 2.
The level code for each variable in the Plackett–Burman design and corresponding production response of 2,3-BD
| Run | Variable levels | 2,3-BD | |||||
|---|---|---|---|---|---|---|---|
| |
X1 |
X2 |
X3 |
X4 |
X5 |
X6 |
(g/L) |
| 1 |
1 |
−1 |
1 |
−1 |
−1 |
−1 |
30.47 ± 0.06 |
| 2 |
1 |
1 |
−1 |
1 |
−1 |
−1 |
32.16 ± 0.64 |
| 3 |
−1 |
1 |
1 |
−1 |
1 |
−1 |
28.63 ± 0.01 |
| 4 |
1 |
−1 |
1 |
1 |
−1 |
1 |
31.31 ± 0.67 |
| 5 |
1 |
1 |
−1 |
1 |
1 |
−1 |
29.55 ± 0.68 |
| 6 |
1 |
1 |
1 |
−1 |
1 |
1 |
29.55 ± 0.28 |
| 7 |
−1 |
1 |
1 |
1 |
−1 |
1 |
30.28 ± 0.61 |
| 8 |
−1 |
−1 |
1 |
1 |
1 |
−1 |
26.67 ± 0.97 |
| 9 |
−1 |
−1 |
−1 |
1 |
1 |
1 |
19.31 ± 0.65 |
| 10 |
1 |
−1 |
−1 |
−1 |
1 |
1 |
22.31 ± 0.49 |
| 11 |
−1 |
1 |
−1 |
−1 |
−1 |
1 |
26.82 ± 0.64 |
| 12 | −1 | −1 | −1 | −1 | −1 | −1 | 18.90 ± 0.59 |