| ANOVA | |||||
| PM2.5 | |||||
| Sum of Squares | df | Mean Square | F | Sig. | |
| Between departments | 16380.946 | 5 | 3276.189 | 3.808 | 0.004 |
| Within departments | 73985.692 | 86 | 860.299 | ||
| Total | 90366.639 | 91 | |||