**Table 16 Statistical analysis for fluctuated concentration rate of the green quantity characteristic**

a. Group statistics(winter) |

Classification | Number of samples (N) | Mean (µg/m^{3}) | Min (µg/m^{3}) | Max (µg/m^{3}) |

Slope-type | 80 | 61.0125 | 23.00 | 97.00 |

Rain-type | 24 | 50.1250 | 45.00 | 56.00 |

Mounding-type | 24 | 30.3750 | 23.00 | 36.00 |

Total/mean | 128 | 47.1708 | 30.33 | 63.00 |

b. Levene's test for equality of variances(winter) |

Levene's statistics | df1 | df2 | Sig. |

13.276 | 2 | 125 | 0.000 |

c. Analysis of variance (ANOVA)(winter) |

Classification | Sum of squares | df | Mean squares | F | Sig. |

Between groups | 17,613.192 | 2 | 8,806.596 | 45.846 | 0.000 |

Within groups | 24,011.238 | 125 | 192.090 | | |

Total | 41,624.430 | 127 | | | |