Table 3.
Descriptive statistics of selected minor elements found in PRD, reported on the basis of total collected dust weight (in ppm). IQR stands for interquartile range. Cadmium, Sb, and Hg were belowthe detection limit (1.5, 30, and 16.5 ppm, respectively).
| Element | Mean | Median | Standard Deviation | Standard Error | Kurtosis | Skewness | Min | Max | IQR |
|---|---|---|---|---|---|---|---|---|---|
| V | 42 | 37 | 31 | 6 | 1 | 1 | <3 | 121 | 41 |
| Cr | 119 | 82 | 120 | 22 | 12 | 3 | 19 | 645 | 116 |
| Co | 355 | 331 | 214 | 39 | 6 | 2 | 103 | 1131 | 238 |
| Cu | 374 | 261 | 349 | 64 | 3 | 2 | 16 | 1478 | 315 |
| Zn | 588 | 349 | 677 | 124 | 8 | 3 | 53 | 3035 | 391 |
| Sn | 577 | 235 | 1661 | 303 | 29 | 5 | <120 | 9339 | 126 |
| Pb | 516 | 202 | 1111 | 203 | 25 | 5 | <45 | 6147 | 373 |