Table 4 ANOVA for orthogonal experiments
Factor | Sum of squares for error | Degree of freedom | F-ratio | F-statistic | Significance |
|---|---|---|---|---|---|
Mass Fraction of Phosphoric Acid (%) | 1,065.929 | 2 | 5.991 | 19.000 | * |
Impregnation Ratio | 226.462 | 2 | 1.273 | 19.000 | |
Temperature (℃) | 177.929 | 2 | 1.000 | 19.000 | |
Time (h) | 315.982 | 2 | 1.776 | 19.000 | |
Error | 177.93 | 2 |