Table 5.
ANOVA for carbon yield of phosphoric acid modified RPSAC.
| Source | Sum of Squares |
Df | Mean Square |
F Value |
p-value Prob > F |
|
|---|---|---|---|---|---|---|
| Model | 441.23 | 14 | 31.52 | 4.76 | 0.0024 | significant |
| A-Concentration | 0.79 | 1 | 0.79 | 0.12 | 0.7342 | |
| B-Impregnation Ratio | 61.06 | 1 | 61.06 | 9.22 | 0.0083 | |
| C-Activation Temperature | 204.28 | 1 | 204.28 | 30.86 | <0.0001 | |
| D-Activation Time | 0.011 | 1 | 0.011 | 1.702E-003 | 0.9676 | |
| AB | 0.012 | 1 | 0.012 | 1.828E-003 | 0.9665 | |
| AC | 61.23 | 1 | 61.23 | 9.25 | 0.0082 | |
| AD | 3.48 | 1 | 3.48 | 0.53 | 0.4797 | |
| BC | 9.64 | 1 | 9.64 | 1.46 | 0.2462 | |
| BD | 6.58 | 1 | 6.58 | 0.99 | 0.3346 | |
| CD | 2.53 | 1 | 2.53 | 0.38 | 0.5458 | |
| A2 | 26.85 | 1 | 26.85 | 4.06 | 0.0623 | |
| B2 | 2.10 | 1 | 2.10 | 0.32 | 0.5814 | |
| C2 | 18.41 | 1 | 18.41 | 2.78 | 0.1161 | |
| D2 | 67.88 | 1 | 67.88 | 10.25 | 0.0059 | |
| Residual | 99.29 | 15 | 6.62 | |||
| Lack of Fit | 26.76 | 10 | 2.68 | 0.18 | 0.9886 | not significant |
| Pure Error | 72.53 | 5 | 14.51 | |||
| Cor Total | 540.52 | 29 |
Values of “Prob > F” <0.05 will implies that the model terms are significant.