Table 2. Descriptive statistics for weather conditions in Beijing, China (2013–2016).
| Mean±SD | Min* | P(25)** | P(50)** | P(75)** | Max*** | |
|---|---|---|---|---|---|---|
| Daily mean temperature (°C) | 12.8±11.2 | -16.0 | 2.0 | 14.0 | 23.0 | 32.0 |
| Daily maximum temperature(°C) | 18.9±11.4 | -13 | 8.0 | 21.0 | 29.0 | 42.0 |
| Daily minimum temperature(°C) | 7.1±11.3 | -17 | -3.0 | 8.0 | 18.0 | 27.0 |
| Humidity (%) | 53.4±19.9 | 8.0 | 38.0 | 53.0 | 69.0 | 97.0 |
| Barometric Pressure (hPa) | 1016.6±10.2 | 994.0 | 1008.0 | 1016.0 | 1025.0 | 1044.0 |
| AQI | 123.7±75.2 | 23.0 | 68.0 | 104.0 | 159.0 | 485.0 |
* minimum.
**the 25th, 50th (median) and 75th percentile, respectively.
***maximum.