Table 7.
ANOVA for quadratic model: response 2: yield of activated carbon, transform: none.
| Source | Sum of squares | df | Mean square | F value | p-value Prob > F | |
|---|---|---|---|---|---|---|
| Model | 2906.88 | 9 | 322.99 | 6.77 | 0.003 | Significant |
| A-Activation temperature | 18.10 | 1 | 18.10 | 4.38 | 0.001 | Significant |
| B-Impregnation ratio | 14.33 | 1 | 14.33 | 0.30 | 0.595 | Not Significant |
| C-Activation time | 1.58 | 1 | 1.58 | 0.03 | 0.859 | Not Significant |
| AB | 18.06 | 1 | 18.06 | 0.38 | 0.552 | Not Significant |
| AC | 539.56 | 1 | 539.56 | 11.32 | 0.007 | Significant |
| BC | 70.57 | 1 | 70.57 | 1.48 | 0.251 | Not Significant |
| A2 | 1005.89 | 1 | 1005.89 | 21.09 | 0.001 | Significant |
| B2 | 479.81 | 1 | 479.81 | 10.06 | 0.010 | Significant |
| C2 | 1176.46 | 1 | 1176.46 | 24.67 | 0.006 | Significant |
| Lack of fit | 443.70 | 5 | 88.74 | 13.38 | 0.641 | Not Significant |
| Pure error | 33.16 | 5 | 6.63 |