Table 6 Variance analysis for filtration efficiency in muddy water.
Source of error | Sum of squares | Degrees of freedom | Mean square | F value | P value |
---|---|---|---|---|---|
Flow rate | 0.043 | 4 | 0.011 | 3.139 | 0.020* |
Sand content | 0.211 | 4 | 0.053 | 49.717 | 9.4211E−20*** |
Aperture of filter screen | 0.022 | 2 | 0.011 | 2.951 | 0.059 |
Errors | 0.338 | 212 | 0.008 | ||
Total | 0.714 | 222 |