Research Article
Statistical Tools for Air Pollution Assessment: Multivariate and Spatial Analysis Studies in the Madrid Region
Table 2
Summary statistics of the air pollutants concentrations.
| | | NO | NO2 | PM10 | O3 |
| | Count | 22 | 22 | 22 | 22 | | Average (µg/m3) | 14.5 | 29.6 | 21.6 | 57.1 | | Standard dev. (µg/m3) | 10.5 | 14.7 | 3.3 | 10.7 | | Coeff. of variation (%) | 72.4 | 49.5 | 15.1 | 18.7 | | Minimum (µg/m3) | 1.1 | 5.2 | 14.6 | 41.4 | | Maximum (µg/m3) | 33.6 | 62.9 | 26.7 | 85.2 | | Range (µg/m3) | 32.5 | 57.7 | 12.1 | 43.7 | | Stnd. skewness | 0.7919 | 0.0866 | −0.3756 | 2.3653 | | Stnd. kurtosis | −0.9398 | −0.1101 | −0.4565 | 1.7539 |
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