Table 6.
ANOVA for specific surface area of phosphoric acid modified RPSAC.
| Source | Sum of Squares |
df | Mean Square |
F Value |
p-value Prob > F |
|
|---|---|---|---|---|---|---|
| Model | 1.483E+005 | 14 | 10590.68 | 4.30 | 0.0041 | significant |
| A-Concentration | 620.17 | 1 | 620.17 | 0.25 | 0.6231 | |
| B-Impregnation Ratio | 308.17 | 1 | 308.17 | 0.13 | 0.7285 | |
| C-Activation Temperature | 1.134E+005 | 1 | 1.134E+005 | 46.05 | <0.0001 | |
| D-Activation Time | 32.67 | 1 | 32.67 | 0.013 | 0.9098 | |
| AB | 100.00 | 1 | 100.00 | 0.041 | 0.8430 | |
| AC | 169.00 | 1 | 169.00 | 0.069 | 0.7969 | |
| AD | 650.25 | 1 | 650.25 | 0.26 | 0.6149 | |
| BC | 240.25 | 1 | 240.25 | 0.098 | 0.7591 | |
| BD | 16.00 | 1 | 16.00 | 6.496E-003 | 0.9368 | |
| CD | 16.00 | 1 | 16.00 | 6.496E-003 | 0.9368 | |
| A2 | 9.33 | 1 | 9.33 | 3.789E-003 | 0.9517 | |
| B2 | 1848.05 | 1 | 1848.05 | 0.75 | 0.4000 | |
| C2 | 27288.05 | 1 | 27288.05 | 11.08 | 0.0046 | |
| D2 | 80.05 | 1 | 80.05 | 0.032 | 0.8594 | |
| Residual | 36946.58 | 15 | 2463.11 | |||
| Lack of Fit | 36165.25 | 10 | 3616.53 | 23.14 | 0.0014 | significant |
| Pure Error | 781.33 | 5 | 156.27 | |||
| Cor Total | 1.852E+005 | 29 |
Values of “Prob > F” <0.05 will implies that the model terms are significant.