Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 330 2010 0 2010 2010 state | 330 43 0 43 43 st_case | 330 430168.3 95.77105 430001 430333 county | 330 72 0 72 72 fatals | 330 1.030303 .1716801 1 2 -------------+--------------------------------------------------------- a_crainj | 330 1 0 1 1 a_region | 330 2 0 2 2 a_ru | 330 1.521212 .5003085 1 2 a_inter | 330 1.827273 .3785854 1 2 a_relrd | 330 2.066667 1.386576 1 4 -------------+--------------------------------------------------------- a_intsec | 330 1.875758 .3394348 1 3 a_roadfc | 330 3.678788 1.592108 1 6 a_junc | 330 1.878788 .3536673 1 4 a_mancol | 330 1.742424 1.263355 1 5 a_tod | 330 1.636364 .4817762 1 2 -------------+--------------------------------------------------------- a_dow | 330 1.50303 .5007501 1 2 a_ct | 330 1.345455 .5639046 1 3 a_lt | 330 1.951515 .2151146 1 2 a_mc | 330 1.851515 .3561199 1 2 a_spcra | 330 1.60303 .4900126 1 2 -------------+--------------------------------------------------------- a_ped | 330 1.69697 .4602661 1 2 a_pedal | 330 1.951515 .2151146 1 2 a_roll | 330 1.933333 .2498226 1 2 a_polpur | 330 2 0 2 2 a_posbac | 330 2.048485 .7297921 1 3 -------------+--------------------------------------------------------- a_d15_19 | 330 1.881818 .3233135 1 2 a_d16_19 | 330 1.884848 .3196895 1 2 a_d15_20 | 330 1.857576 .3500155 1 2 a_d16_20 | 330 1.860606 .3468831 1 2 a_d65pls | 330 1.887879 .3159947 1 2 -------------+--------------------------------------------------------- a_d21_24 | 330 1.827273 .3785854 1 2 a_d16_24 | 330 1.70303 .457617 1 2 a_rd | 330 1.693939 .4615551 1 2 a_hr | 330 1.930303 .2550223 1 2 a_dist | 330 1.99697 .0550482 1 2 -------------+--------------------------------------------------------- a_drowsy | 330 1.993939 .0777315 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016