Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 341 2011 0 2011 2011 state | 341 43 0 43 43 st_case | 341 430172.3 98.93973 430001 430343 county | 341 72 0 72 72 fatals | 341 1.052786 .2367044 1 3 -------------+--------------------------------------------------------- a_crainj | 341 1 0 1 1 a_region | 341 2 0 2 2 a_ru | 341 1.466276 .4995945 1 2 a_inter | 341 1.821114 .3838197 1 2 a_relrd | 341 2.017595 1.391037 1 4 -------------+--------------------------------------------------------- a_intsec | 341 1.932551 .2841327 1 3 a_roadfc | 341 3.607038 1.567447 1 6 a_junc | 341 1.941349 .3291119 1 4 a_mancol | 341 1.791789 1.267486 1 5 a_tod | 341 1.656891 .475445 1 2 -------------+--------------------------------------------------------- a_dow | 341 1.545455 .4986613 1 2 a_ct | 341 1.398827 .593493 1 3 a_lt | 341 1.944282 .2297143 1 2 a_mc | 341 1.847507 .3600261 1 2 a_spcra | 341 1.615836 .4871118 1 2 -------------+--------------------------------------------------------- a_ped | 341 1.680352 .4670255 1 2 a_pedal | 341 1.979472 .1420056 1 2 a_roll | 341 1.923754 .2657818 1 2 a_polpur | 341 2 0 2 2 a_posbac | 341 2.199413 .7601081 1 3 -------------+--------------------------------------------------------- a_d15_19 | 341 1.912023 .283677 1 2 a_d16_19 | 341 1.912023 .283677 1 2 a_d15_20 | 341 1.876833 .3291119 1 2 a_d16_20 | 341 1.876833 .3291119 1 2 a_d65pls | 341 1.829912 .3762622 1 2 -------------+--------------------------------------------------------- a_d21_24 | 341 1.829912 .3762622 1 2 a_d16_24 | 341 1.72434 .4475028 1 2 a_rd | 341 1.721408 .4489652 1 2 a_hr | 341 1.941349 .2353157 1 2 a_dist | 341 2 0 2 2 -------------+--------------------------------------------------------- a_drowsy | 341 2 0 2 2 by Jean Roth , jroth@nber.org , 18 Apr 2016