Table 1 Values of the descriptive statistics of HMs concentrations (mg.kg−1) in surface sediments of lakes in the N2 areas.
Statistics | Cr | Ni | Cu | Zn | Cd | Pb |
|---|---|---|---|---|---|---|
Minimum | 2.51 | 1.33 | 0.20 | 13.0 | 0.025 | 2.0 |
1st Quartile | 6.50 | 4.83 | 7.15 | 44.0 | 0.117 | 22.0 |
Mean | 13.06 | 9.58 | 21.66 | 87.5 | 0.961 | 45.7 |
Median | 9.44 | 7.24 | 13.30 | 72.0 | 0.486 | 37.0 |
3rd Quartile | 17.50 | 12.80 | 24.00 | 126.0 | 1.590 | 70.0 |
Maximum | 106.00 | 29.00 | 164.00 | 240.0 | 7.630 | 150.0 |
Standard deviation | 13.15 | 6.25 | 25.71 | 53.9 | 1.164 | 33.8 |
Interquartile range | 11.0 | 7.97 | 16.85 | 82.0 | 1.473 | 48.0 |
Coefficient of variation | 100.67 | 65.26 | 118.69 | 61.53 | 121.19 | 74.08 |
Skewness (-) | 4.90 | 1.13 | 3.24 | 0.98 | 2.76 | 0.96 |
Kurtosis (-) | 32.80 | 0.73 | 13.59 | 0.19 | 12.99 | 0.50 |
Distribution type (-) | Lognormal | Lognormal | Lognormal | Lognormal | Lognormal | Lognormal |
Number of outliers (-) | 2 | 0 | 4 | 0 | 1 | 0 |
