变量 | 样本量 | 均值 | 标准差 | 最小值 | 中位数 | 最大值 |
so2 | 434 | 65.78 | 45.211 | 0.1 | 56.24904 | 200.3 |
Landx | 434 | 1782.82 | 2783.195 | 6.71 | 779.995 | 18,088.79 |
Landzpg | 434 | 6241.86 | 6303.443 | 9.73 | 4499.445 | 37,830.37 |
str | 434 | 46.24 | 8.368 | 19 | 47.7 | 61.5 |
gdp | 434 | 36,449.44 | 24,081.53 | 4215 | 32,497 | 128,994 |
urban | 434 | 51.35 | 14.732 | 22.61 | 49.355 | 89.76 |