Research on Influential Factors of PM2.5 within the Beijing-Tianjin-Hebei Region in China

Table 7

The importance analysis results.

Variable	Coefficient	Std. error	-Statistic	Prob.
log(IF1?)	0.558207	0.148701	3.753885	0.0005
log(IF3?)	0.164398	0.100609	1.634033	0.1097
log(IF4?)	0.042059	0.051307	1.819736	0.4170
log(IF6?)	0.463459	0.219537	2.111081	0.0408
log(IF9?)	−0.357751	0.103945	3.441728	0.0013
log(IF11?)	−0.052365	0.059223	1.884206	0.3816
log(IF12?)	0.122102	0.047022	2.596724	0.0129
log(IF13?)	0.045020	0.120676	1.373067	0.7110
log(IF15?)	−0.158461	0.101994	−1.553635	0.1278
	2.142050	0.955355	2.242151	0.0303
Weighted statistics
-squared	0.867354	Mean dependent var		5.937831
Adjusted -squared	0.838930	SD dependent var		3.341899
SE of regression	0.235279	Sum squared resid		2.324971
-statistic	30.51465	Durbin-Watson stat		0.962111
Prob. (-statistic)	0.000000
Unweighted statistics
-squared	0.672834	Mean dependent var		4.508054
Sum squared resid	2.865887	Durbin-Watson stat		0.767658