Summary statistics for accident dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 39,747 28.2454 15.62934 1 56 county | 39,747 86.96402 92.29953 1 999 month | 39,747 6.787707 3.312095 1 12 day | 39,747 15.78622 8.81966 1 31 year | 39,747 76 0 76 76 -------------+--------------------------------------------------------- hour | 39,747 13.44122 10.47555 0 99 minute | 39,747 26.90341 18.48364 0 99 ve_forms | 39,747 1.411025 .6360196 0 16 persons | 39,747 2.657031 1.82308 1 53 vehicles | 39,747 1.438951 1.155658 1 99 -------------+--------------------------------------------------------- land_use | 39,747 1.630714 .4984155 1 9 cl_tway | 39,747 4.671698 1.846408 1 9 road_fnc | 0 ta_1_cl | 0 sp_jur | 39,747 .1328654 1.03736 0 9 -------------+--------------------------------------------------------- harm_ev | 39,747 13.49161 7.955801 1 99 man_coll | 39,747 1.14313 1.756405 0 9 rel_junc | 39,747 1.378947 .855691 1 9 rel_road | 39,747 2.11616 1.628375 1 9 road_flo | 39,747 3.88925 .7068483 3 9 -------------+--------------------------------------------------------- no_lanes | 39,747 2.502176 1.36017 1 9 sp_limit | 39,747 56.85745 23.17912 5 99 alignmnt | 39,747 2.537852 2.988984 1 9 profile | 39,747 3.676479 3.647796 1 9 pave_typ | 39,747 2.750069 2.294715 1 9 -------------+--------------------------------------------------------- sur_cond | 39,747 1.28767 .8901411 1 9 tra_cont | 39,747 4.655043 19.77554 0 99 lgt_cond | 39,747 1.904647 1.19473 1 9 weather | 39,747 1.39296 1.393002 1 9 hit_run | 39,747 .0536896 .3173724 0 2 -------------+--------------------------------------------------------- c_m_zone | 0 not_hour | 39,747 73.89921 39.91659 0 99 not_min | 39,747 77.79188 34.99064 0 99 arr_hour | 39,747 68.73545 41.88599 0 99 arr_min | 39,747 73.60221 36.58375 0 99 -------------+--------------------------------------------------------- sch_bus | 0 cf1 | 39,747 3.405087 14.29558 0 99 cf2 | 39,747 2.084434 13.24412 0 99 cf3 | 39,747 1.746371 12.92617 0 99 fatals | 39,747 1.145319 .5062046 1 29 -------------+--------------------------------------------------------- day_week | 39,747 4.254812 2.152184 1 7 drunk_dr | 39,747 .2118399 .4250943 0 2 st_case | 39,747 283187.1 156173.7 10001 560208 city | 39,747 1099.485 1980.902 0 9999 rail | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016