Summary statistics for accident dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 486 43 0 43 43 county | 486 72 0 72 72 month | 486 6.683128 3.541565 1 12 day | 486 16.39506 8.989816 1 31 year | 486 83 0 83 83 -------------+--------------------------------------------------------- hour | 486 14.59877 11.22155 0 99 minute | 486 23.39506 18.91632 0 99 ve_forms | 486 1.312757 .5381544 1 3 persons | 486 2.711934 2.816619 1 52 land_use | 486 1.572016 .4952963 1 2 -------------+--------------------------------------------------------- road_fnc | 486 4.995885 2.318901 2 8 fed_aid | 486 4.841564 2.575379 2 8 cl_tway | 486 3.440329 .7940105 2 8 sp_jur | 486 .0041152 .0640839 0 1 harm_ev | 486 14.50823 10.97377 1 44 -------------+--------------------------------------------------------- man_coll | 486 .7469136 1.475484 0 6 rel_junc | 486 1.22428 .5421483 1 5 rel_road | 486 1.895062 1.53559 1 9 tway_flo | 486 1.372428 .7315998 1 4 no_lanes | 486 2.606996 .965312 1 6 -------------+--------------------------------------------------------- sp_limit | 486 38.77572 9.035617 0 55 alignmnt | 486 1.141975 .3493844 1 2 profile | 486 1.251029 .5360691 1 3 pave_typ | 486 1.820988 .3995511 1 4 sur_cond | 486 1.146091 .3869723 1 5 -------------+--------------------------------------------------------- tra_cont | 486 3.506173 13.36077 0 99 t_cont_f | 486 .4650206 1.135106 0 9 hit_run | 486 .244856 .6546615 0 3 lgt_cond | 486 2.026749 1.172408 1 9 weather | 486 1.092593 .2901593 1 2 -------------+--------------------------------------------------------- c_m_zone | 486 .0041152 .0640839 0 1 not_hour | 486 15.48354 35.99437 0 99 not_min | 486 15.54321 35.99435 0 99 arr_hour | 486 15.48354 35.99437 0 99 arr_min | 486 15.57407 36.01319 0 99 -------------+--------------------------------------------------------- sch_bus | 486 .0041152 .0640839 0 1 cf1 | 486 .1213992 1.12684 0 16 cf2 | 486 .0144033 .3175264 0 7 cf3 | 486 0 0 0 0 fatals | 486 1.057613 .2885686 1 4 -------------+--------------------------------------------------------- day_week | 486 4.333333 2.284867 1 7 drunk_dr | 486 .3539095 .5119753 0 2 st_case | 486 430247.7 143.2221 430001 430494 city | 486 504.3086 334.3616 10 1060 milept | 476 226.6303 726.1476 0 9580 -------------+--------------------------------------------------------- tway_id | 0 rail | 0 by Jean Roth , jroth@nber.org , 18 Apr 2016