Research Article
Backward Trajectory and Multifractal Analysis of Air Pollution in Zhengzhou Region of China
Table 2
Descriptive statistics of daily AQI.
| City | Minimum | Maximum | Mean | Standard deviation | Skewness | Kurtosis |
| Shijiazhuang | 28 | 316 | 134.868 | 69.532 | 0.497 | -0.585 | Jinan | 23 | 240 | 98.879 | 48.787 | 0.861 | 0.162 | Zibo | 26 | 290 | 103.461 | 48.178 | 1.293 | 2.282 | Luoyang | 35 | 295 | 110.956 | 53.523 | 1.163 | 1.116 | Zhengzhou | 30 | 292 | 122.561 | 63.582 | 0.964 | 0.239 |
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