Summary statistics for accident dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 39,631 27.68961 16.16385 1 56 county | 39,631 88.27867 96.71423 0 999 month | 39,631 6.840806 3.307309 1 12 day | 39,631 15.69748 8.882171 1 99 year | 39,631 84 0 84 84 -------------+--------------------------------------------------------- hour | 39,631 13.28589 10.7473 0 99 minute | 39,631 30.29459 22.95616 0 99 ve_forms | 39,631 1.462794 .6501788 1 23 persons | 39,631 2.607832 1.817423 1 51 land_use | 39,631 1.571674 .5359675 1 9 -------------+--------------------------------------------------------- road_fnc | 39,631 4.55989 2.190277 1 9 fed_aid | 39,631 3.862456 2.395266 1 9 cl_tway | 39,631 3.437688 1.518578 1 9 sp_jur | 39,631 .0219273 .3035639 0 9 harm_ev | 39,631 16.38717 12.12316 1 99 -------------+--------------------------------------------------------- man_coll | 39,631 1.115087 1.634523 0 9 rel_junc | 39,631 1.504883 1.135605 1 9 rel_road | 39,631 2.341955 1.875899 1 9 tway_flo | 39,631 1.412001 .8727352 1 9 no_lanes | 39,631 2.418486 1.075786 1 9 -------------+--------------------------------------------------------- sp_limit | 39,631 47.84033 13.94668 0 99 alignmnt | 39,631 1.280992 .5713063 1 9 profile | 39,631 1.420353 1.097037 1 9 pave_typ | 39,631 2.22442 1.440642 1 9 sur_cond | 39,631 1.281144 .7928124 1 9 -------------+--------------------------------------------------------- tra_cont | 39,631 4.182206 11.99337 0 99 t_cont_f | 39,631 .6156292 1.319221 0 9 hit_run | 39,631 .0770357 .3781107 0 3 lgt_cond | 39,631 1.863667 .9925078 1 9 weather | 39,631 1.277586 .9446087 1 9 -------------+--------------------------------------------------------- c_m_zone | 39,631 .0224067 .2145421 0 4 not_hour | 39,631 46.93011 43.45661 0 99 not_min | 39,631 55.75284 38.52471 0 99 arr_hour | 39,631 43.97759 42.76065 0 99 arr_min | 39,631 53.68853 38.05119 0 99 -------------+--------------------------------------------------------- sch_bus | 39,631 .003356 .0578341 0 1 cf1 | 39,631 .5735157 7.062633 0 99 cf2 | 39,631 .501577 7.016159 0 99 cf3 | 39,631 .4997098 7.015202 0 99 fatals | 39,631 1.116727 .4193172 1 10 -------------+--------------------------------------------------------- day_week | 39,631 4.207287 2.151375 1 9 drunk_dr | 39,631 .4358961 .5471209 0 4 st_case | 39,631 277738.4 161476.4 10001 560140 city | 39,631 1180.316 1995.488 0 9999 milept | 39,481 32378.32 46488.32 0 99999 -------------+--------------------------------------------------------- tway_id | 0 rail | 0 by Jean Roth , jroth@nber.org , 18 Apr 2016