Summary statistics for accident dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 41,438 27.22173 16.04389 1 56 county | 41,438 85.3476 92.17909 1 997 month | 41,438 6.854674 3.312088 1 12 day | 41,438 15.65691 8.845908 1 99 year | 41,438 87 0 87 87 -------------+--------------------------------------------------------- hour | 41,438 13.42246 10.73639 0 99 minute | 41,438 27.67783 18.54493 0 99 ve_forms | 41,438 1.492253 .6963513 1 22 persons | 41,438 2.689729 1.813863 1 47 fed_aid | 41,438 3.129833 1.396401 1 9 -------------+--------------------------------------------------------- road_fnc | 41,438 7.988199 5.951983 1 99 route | 41,438 3.63268 1.789958 1 9 sp_jur | 41,438 .0249288 .3119074 0 9 harm_ev | 41,438 16.43315 12.14332 1 99 man_coll | 41,438 1.156571 1.653024 0 9 -------------+--------------------------------------------------------- rel_junc | 41,438 1.468893 1.052538 1 9 rel_road | 41,438 2.390246 1.925767 1 9 traf_flo | 41,438 1.435108 .9516005 1 9 no_lanes | 41,438 2.437738 1.103746 1 9 sp_limit | 41,438 47.81056 13.41769 0 99 -------------+--------------------------------------------------------- alignmnt | 41,438 1.284883 .5798032 1 9 profile | 41,438 1.410686 1.008889 1 9 pave_typ | 41,438 2.225421 1.424562 1 9 sur_cond | 41,438 1.246851 .7489962 1 9 tra_cont | 41,438 4.065182 11.43053 0 99 -------------+--------------------------------------------------------- t_cont_f | 41,438 .604228 1.239317 0 9 hit_run | 41,438 .0751725 .3725387 0 3 lgt_cond | 41,438 1.854433 1.016123 1 9 weather | 41,438 1.23254 .8222484 1 9 c_m_zone | 41,438 .0202712 .1986374 0 4 -------------+--------------------------------------------------------- not_hour | 41,438 39.91276 41.41797 0 99 not_min | 41,438 49.98255 37.18172 0 99 arr_hour | 41,438 37.47114 40.43548 0 99 arr_min | 41,438 48.48914 36.47777 0 99 hosp_hr | 41,438 57.09984 45.92535 0 99 -------------+--------------------------------------------------------- hosp_mn | 41,438 61.36901 43.00321 0 99 sch_bus | 41,438 .0037405 .0610461 0 1 cf1 | 41,438 .4478498 6.242458 0 99 cf2 | 41,438 .3906801 6.197793 0 99 cf3 | 41,438 .3894252 6.196964 0 99 -------------+--------------------------------------------------------- fatals | 41,438 1.119504 .4208819 1 9 day_week | 41,438 4.228365 2.131792 1 9 drunk_dr | 41,438 .4478498 .5502656 0 4 st_case | 41,438 273093.8 160194.6 10001 560114 milept | 41,426 19065 38810.51 0 99999 -------------+--------------------------------------------------------- city | 41,438 1000.375 1788.439 0 9999 tway_id | 0 rail | 0 by Jean Roth , jroth@nber.org , 18 Apr 2016