Table 2 Experimental design and corresponding responses of the Box–Behnken experiment
Standard order | A | B | C | D | Tannase activity (U/gds) | |
|---|---|---|---|---|---|---|
Experimental value | Predicted value | |||||
1 | 3 | 3 | 9 | 3.5 | 3.63 | 3.73 |
2 | 9 | 3 | 9 | 3.5 | 4.13 | 4.84 |
3 | 3 | 9 | 9 | 3.5 | 10.07 | 9.01 |
4 | 9 | 9 | 9 | 3.5 | 14.60 | 14.15 |
5 | 6 | 6 | 6 | 1 | 12.46 | 11.91 |
6 | 6 | 6 | 12 | 1 | 11.88 | 11.57 |
7 | 6 | 6 | 6 | 6 | 8.57 | 8.53 |
8 | 6 | 6 | 12 | 6 | 8.60 | 8.81 |
9 | 3 | 6 | 9 | 1 | 8.70 | 8.70 |
10 | 9 | 6 | 9 | 1 | 12.80 | 12.80 |
11 | 3 | 6 | 9 | 6 | 6.77 | 6.61 |
12 | 9 | 6 | 9 | 6 | 8.92 | 8.76 |
13 | 6 | 3 | 6 | 3.5 | 6.49 | 5.48 |
14 | 6 | 9 | 6 | 3.5 | 11.93 | 12.38 |
15 | 6 | 3 | 12 | 3.5 | 5.68 | 5.06 |
16 | 6 | 9 | 12 | 3.5 | 11.90 | 12.75 |
17 | 3 | 6 | 6 | 3.5 | 7.24 | 8.12 |
18 | 9 | 6 | 6 | 3.5 | 10.07 | 10.34 |
19 | 3 | 6 | 12 | 3.5 | 6.95 | 7.19 |
20 | 9 | 6 | 12 | 3.5 | 11.60 | 11.23 |
21 | 6 | 3 | 9 | 1 | 6.48 | 7.07 |
22 | 6 | 9 | 9 | 1 | 13.57 | 13.84 |
23 | 6 | 9 | 9 | 6 | 3.24 | 3.47 |
24 | 6 | 9 | 9 | 6 | 11.38 | 11.30 |
25 | 6 | 6 | 9 | 3.5 | 12.89 | 13.38 |
26 | 6 | 6 | 9 | 3.5 | 13.79 | 13.38 |
27 | 6 | 6 | 9 | 3.5 | 13.75 | 13.38 |
28 | 6 | 6 | 9 | 3.5 | 13.09 | 13.38 |
29 | 6 | 6 | 9 | 3.5 | 13.35 | 13.38 |