Summary statistics for accident dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 571 43 0 43 43 county | 571 72 0 72 72 month | 571 6.676007 3.505149 1 12 day | 571 15.79685 9.200728 1 31 year | 571 87 0 87 87 -------------+--------------------------------------------------------- hour | 571 12.99475 7.546695 0 23 minute | 571 22.45709 17.03854 0 55 ve_forms | 571 1.355517 .6023785 1 5 persons | 571 2.579685 1.472034 1 12 fed_aid | 571 3.336252 1.232199 2 9 -------------+--------------------------------------------------------- road_fnc | 571 8.008757 6.301901 2 99 route | 571 4.206655 .6374493 3 9 sp_jur | 571 .0017513 .0418487 0 1 harm_ev | 571 14.26795 10.78091 1 43 man_coll | 571 .6112084 1.087156 0 4 -------------+--------------------------------------------------------- rel_junc | 571 1.145359 .5411735 1 9 rel_road | 571 1.880911 1.612398 1 9 traf_flo | 571 1.362522 .5981814 1 9 no_lanes | 571 2.21366 .5802804 1 9 sp_limit | 571 37.29247 6.444113 35 99 -------------+--------------------------------------------------------- alignmnt | 571 1.119089 .4509287 1 9 profile | 571 1.119089 .4624533 1 9 pave_typ | 571 1.952715 .3786479 1 9 sur_cond | 571 1.218914 .5191689 1 9 tra_cont | 571 3.45359 10.98831 0 50 -------------+--------------------------------------------------------- t_cont_f | 571 .4238179 1.042463 0 3 hit_run | 571 .2311734 .631741 0 2 lgt_cond | 571 2.098074 1.147467 1 9 weather | 571 1.203152 .5205165 1 9 c_m_zone | 571 .0105079 .132035 0 2 -------------+--------------------------------------------------------- not_hour | 571 13.0035 33.46965 0 99 not_min | 571 13.0035 33.46965 0 99 arr_hour | 571 13.0035 33.46965 0 99 arr_min | 571 13.0035 33.46965 0 99 hosp_hr | 571 .3467601 5.853975 0 99 -------------+--------------------------------------------------------- hosp_mn | 571 .3467601 5.853975 0 99 sch_bus | 571 0 0 0 0 cf1 | 571 .17338 4.143021 0 99 cf2 | 571 .17338 4.143021 0 99 cf3 | 571 .17338 4.143021 0 99 -------------+--------------------------------------------------------- fatals | 571 1.075306 .2954682 1 3 day_week | 571 4.190893 2.220397 1 7 drunk_dr | 571 .352014 .5367955 0 2 st_case | 571 430294.2 170.7043 430001 430593 milept | 570 635.6404 5924.637 0 99999 -------------+--------------------------------------------------------- city | 571 517.1156 330.2141 10 1060 tway_id | 0 rail | 0 by Jean Roth , jroth@nber.org , 18 Apr 2016