Table 4.
Variance analysis of the effects of process variables on GABA content
| Origin of variance | Sum of squares | df | Mean square | F value | P value |
|---|---|---|---|---|---|
| x 1 | 18.99 | 1 | 18.99 | 26.47 | 0.0002** |
| x 2 | 17.42 | 1 | 17.42 | 24.28 | 0.0003** |
| x 3 | 17.25 | 1 | 17.25 | 24.04 | 0.0003** |
| x 1 x 2 | 0.13 | 1 | 0.13 | 0.17 | 0.6832 |
| x 1 x 3 | 1.13 | 1 | 1.13 | 1.57 | 0.2325 |
| x 2 x 3 | 0.13 | 1 | 0.13 | 0.17 | 0.6832 |
| x 1 2 | 55.45 | 1 | 55.45 | 77.31 | <0.0001** |
| x 2 2 | 65.3 | 1 | 65.3 | 91.04 | <0.0001** |
| x 3 2 | 4.34 | 1 | 4.34 | 6.06 | 0.0286* |
| Model | 178.87 | 9 | 19.87 | 27.71 | <0.0001** |
| Residual | 9.32 | 13 | 0.72 | ||
| Lack of fit | 6.47 | 5 | 1.29 | 3.62 | 0.0522 |
| Pure error | 2.86 | 8 | 0.36 | ||
| All terms | 188.19 | 22 |
Note: x 1 represents once moisture adding amount of stage I; x 2 represents once moisture adding amount of stage II; x 3 represents once moisture adding amount of stage III. **extremely significant (p < 0.01), *significant (p < 0.05)