Table 3.

Descriptive statistics of variables

	N	Mean	Median	Std. deviation	Minimum	Maximum
Period from 2001 to 2003
BCollision	282	11.34	2	28.54	0	174
BDist	282	523.44	1.05	1438.69	0.00	10 255.73
VehDist	282	0.11	0.07	0.13	0.00	0.81
BTrack	282	0.39	0.00	1.35	0.00	12.15
ComArea	282	0.01	0.001	0.02	0.00	0.18
ResArea	282	0.27	0.16	0.31	0.00	1.87
Road	282	15.33	11.71	13.02	0.00	80.13
JunDensity	282	6.30	6.47	2.83	0.00	21.16
Population	282	23.78	7.52	36.65	0.00	203.62
pAge0_14	282	12.75	13.40	3.35	0.0	21.4
pAge15_24	282	11.07	10.80	3.63	2.5	28.2
pAge25_44	282	35.01	34.60	5.45	21.9	57.9
pAge45_64	282	29.37	29.00	4.23	15.4	43.8
pMale	282	0.47	0.46	0.06	0.30	0.80
MeEmIncome	282	12.57	10.00	6.98	0.00	75.00
Period from 2010 to 2012
BCollision	289	14.34	3	33.59	0	292
BDist	289	456.78	0.90	1146.06	0.00	7590.66
VehDist	29	0.10	0.06	0.12	0.00	0.76
BTrack	289	0.39	0.00	1.33	0.00	12.17
ComArea	289	0.01	0.001	0.02	0.00	0.18
ResArea	289	0.26	0.15	0.32	0.00	1.87
Road	289	15.49	11.87	13.66	0.00	79.42
JunDensity	289	6.01	6.01	2.75	0.00	21.16
Population	289	24.47	8.98	38.10	0.00	287.90
pAge0_14	289	12.28	12.30	3.00	0.0	20.8
pAge15_24	289	10.77	10.70	3.08	2.2	27.2
pAge25_44	289	34.00	33.00	5.32	21.0	57.3
pAge45_64	289	30.27	30.50	3.85	15.9	44.7
pMale	289	0.47	0.47	0.05	0.36	0.85
MeEmIncome	289	18.45	14.07	12.07	0.00	100.00