Table 6.
Testing differences between PM_2.5 and Space types group means in unhealthy level

Classification		PM2.5
		N.	ave.	Sth. deviation	F	p	Scheffe
Space type	A	404	36.0	8.2	18.894	0.000***	D,E <A,B,C
	B	392	35.9	8.8
	C	386	35.9	8.2
	D	394	32.4	668.0
	E	389	33.0	7.9

^*p<.05, ^**p<.01, ^***p<.001.