Table 6.
ANOVA for quadratic model in CCD model.
| Source | Sum of square | d.f | Mean square | F-value | p-value |
|---|---|---|---|---|---|
| Model | 392.60 | 14 | 28.04 | 38.87 | <0.0001 |
| A-Lactose | 5.89 | 1 | 5.89 | 8.17 | 0.0120 |
| B-Soya peptone | 17.50 | 1 | 17.35 | 24.26 | 0.0002 |
| C-Uric acid | 72.26 | 1 | 72.26 | 100.16 | <0.0001 |
| D-FeSO4.7H2O | 0.4726 | 1 | 0.4726 | 0.6551 | 0.4310 |
| AB | 0.0749 | 1 | 0.0749 | 0.1039 | 0.7517 |
| AC | 0.4918 | 1 | 0.4918 | 0.6816 | 0.4220 |
| AD | 0.2822 | 1 | 0.2822 | 0.3912 | 0.5411 |
| BC | 1.49 | 1 | 1.49 | 2.07 | 0.1710 |
| BD | 0.4778 | 1 | 0.4778 | 0.6623 | 0.4285 |
| CD | 0.3922 | 1 | 0.3922 | 0.5436 | 0.4723 |
| A2 | 33.74 | 1 | 33.74 | 46.77 | <0.0001 |
| B2 | 46.47 | 1 | 46.47 | 64.41 | <0.0001 |
| C2 | 83.10 | 1 | 83.10 | 115.18 | <0.0001 |
| D2 | 1.72 | 1 | 1.72 | 2.38 | 0.1438 |
| Residual | 10.82 | 15 | 0.7214 | ||
| Lack of fit | 9.44 | 10 | 0.9441 | 3.42 | 0.0935 |
| Pure error | 1.38 | 5 | 0.2760 | ||
| Corrected total | 403.42 | 29 |
*Significant p_values at P ≤ 0.05.