Table 2 Box-Behnken matrix for three factors at three levels high (+ 1), low (− 1) and basal (0)
From: Production, statistical evaluation and characterization of chitosanase from Fusarium oxysporum D18
Trial | X1 | X2 | X3 |
|---|---|---|---|
1 | − 1 | − 1 | 0 |
2 | − 1 | 1 | 0 |
3 | 1 | − 1 | 0 |
4 | 1 | 1 | 0 |
5 | 0 | − 1 | − 1 |
6 | 0 | − 1 | 1 |
7 | 0 | 1 |  − 1 |
8 | 0 | 1 | 1 |
9 | − 1 | 0 | − 1 |
10 | 1 | 0 | − 1 |
11 | − 1 | 0 | 1 |
12 | 1 | 0 | 1 |
13 | 0 | 0 | 0 |
14 | 0 | 0 | 0 |
15 | 0 | 0 | 0 |