Table 7 Analysis of variance table for input variable screening
From: Factorial design study of total petroleum contaminated soil treatment using land farming technique
| ANOVA for selected factorial model | ||||||
|---|---|---|---|---|---|---|
| Analysis of variance table (partial sum of squares type-III) | ||||||
| Source | Sum of squares | df | Mean square | F-Value |
P-Value Prob > F | Comments |
| Model | 1.736E+0.06 | 10 | 1.736E+ 005 | 56.24 | < 0.0001 | Significant |
| A-pH | 79,778 | 1 | 79,778 | 25.85 | 0.0009 | |
| B-Moisture content | 8845 | 1 | 8845 | 2.87 | 0.1289 | |
| C-Mass of substrate | 842 | 1 | 843 | 0.27 | 0.6155 | |
| D-Turning rate | 1.515E+ 006 | 1 | 1.515E+ 006 | 490.76 | < 0.0001 | |
| AB | 150 | 1 | 150 | 0.048 | 0.8312 | |
| AC | 14,629 | 1 | 14,629 | 4.74 | 0.0612 | |
| AD | 21,650 | 1 | 21,650 | 7.01 | 0.0293 | |
| BC | 44,310 | 1 | 44,310 | 14.35 | 0.0053 | |
| BD | 145 | 1 | 145 | 0.047 | 0.8339 | |
| CD | 50,623 | 1 | 50,623 | 16.40 | 0.0037 | |
| Curvature | 69,348 | 1 | 69,348 | 22.47 | 0.0015 | Significant |
| Residual | 24,694 | 8 | 3067 | |||
| Lack of fit | 12,376 | 5 | 2475 | 0.60 | 0.7107 | Non-significant |
| Pure error | 12,318 | 3 | 4106 | |||