Statistic feature | Cu | As | Pb | Hg | Cd |
Range | 5.03 - 66.26 | 2.42 - 13.52 | 7.85 - 45.17 | 0.016 - 0.06 | 0.047 - 0.186 |
Mean | 18.90 | 6.70 | 19.93 | 0.04 | 0.09 |
Median | 13.69 | 6.50 | 18.88 | 0.04 | 0.07 |
Root-mean-square deviation | 13.76 | 2.15 | 9.35 | 0.01 | 0.04 |
Coefficientof variation | 0.73 | 0.32 | 0.47 | 0.32 | 0.48 |