Table 3.
Analysis of variance for the experimental results of Box–Behnken methodology for quadratic model.
| Source | Sum of Squares | Df | Mean Square | F Value | p-value Prob > F |
|---|---|---|---|---|---|
| Model | 25904.31 | 20 | 1295.22 | 9.83 | <0.0001 |
| A-Tryptophan | 561.25 | 1 | 561.25 | 4.26 | 0.0500 |
| B-Temperature | 136.43 | 1 | 136.43 | 1.04 | 0.3189 |
| C-pH | 208.86 | 1 | 208.86 | 1.59 | 0.2200 |
| D-Potato Dextrose Broth | 242.83 | 1 | 242.83 | 1.84 | 0.1871 |
| E-Incubation Period | 3.59 | 1 | 3.59 | 0.027 | 0.8702 |
| AB | 27.67 | 1 | 27.67 | 0.21 | 0.6508 |
| AC | 358.48 | 1 | 358.48 | 2.72 | 0.1120 |
| AD | 562.66 | 1 | 562.66 | 4.27 | 0.0497 |
| AE | 85.85 | 1 | 85.85 | 0.65 | 0.4274 |
| BC | 2.83 | 1 | 2.83 | 0.021 | 0.8847 |
| BD | 31.81 | 1 | 31.81 | 0.24 | 0.6276 |
| BE | 0.81 | 1 | 0.81 | 6.157E-003 | 0.9381 |
| CD | 1108.48 | 1 | 1108.48 | 8.42 | 0.0078 |
| CE | 0.16 | 1 | 0.16 | 1.232E-003 | 0.9723 |
| DE | 4.06 | 1 | 4.06 | 0.031 | 0.8621 |
| A2 | 1945.87 | 1 | 1945.87 | 14.78 | 0.0008 |
| B2 | 115.94 | 1 | 115.94 | 0.88 | 0.3574 |
| C2 | 178.75 | 1 | 178.75 | 1.36 | 0.2555 |
| D2 | 5.17 | 1 | 5.17 | 0.039 | 0.8446 |
| E2 | 3.34 | 1 | 3.34 | 0.025 | 0.8749 |
| Lack of fit | 3152.45 | 20 | 157.62 | 76.25 | 0.0004 |
| Residual | 3160.71 | 24 | 131.70 | – | – |
| Pure Error | 8.27 | 4 | 2.07 | – | – |
| Cor Total | 29065.02 | 44 | – | – | – |