Research Article
Multiple‐Factor Influence on Air Quality of Road Motor Vehicles Tail Number Limit in Administrative Area of Beijing, China
Table 2
Pearson correlation analysis of restricted days with non-4 and 9 restricted days.
| | Peaks and valleys (n) | R2 | Pearson correlation coefficient | X2 | | Tail number of 4 and 9 days | Tail number of non-4 and 9 days |
| AQI | 6 | 6 | 0.6835 | 12.0887 | 0.6672 | | PM2.5 | 6 | 6 | 0.7046 | 4.6509 | 0.6123 | | PM10 | 6 | 6 | 0.5995 | 17.6523 | 0.5052 | | SO2 | 6 | 6 | 0.7593 | 11.8825 | 0.1913 | | CO | 6 | 6 | 0.6341 | 22.7531 | 0.6329 | <0.01 | NO2 | 6 | 6 | 0.6351 | 15.6144 | 0.8259 | <0.05 | O3_8h | 6 | 6 | 0.6665 | 35.1589 | 0.1806 | >0.05 |
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