Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 430 2007 0 2007 2007 state | 430 43 0 43 43 county | 430 72 0 72 72 fatals | 430 1.051163 .2205863 1 2 st_case | 430 430216.4 124.4653 430001 430431 -------------+--------------------------------------------------------- a_crainj | 430 1 0 1 1 a_region | 430 2 0 2 2 a_ru | 430 1.511628 .500447 1 2 a_inter | 430 1.827907 .377901 1 2 a_relrd | 430 1.981395 1.362032 1 4 -------------+--------------------------------------------------------- a_intsec | 430 1.988372 .1073289 1 2 a_roadfc | 430 3.660465 1.581086 1 6 a_junc | 430 1.988372 .1073289 1 2 a_mancol | 430 1.85814 1.277697 1 5 a_tod | 430 1.686047 .4646383 1 2 -------------+--------------------------------------------------------- a_dow | 430 1.546512 .4984119 1 2 a_hr | 430 1.923256 .2664952 1 2 a_ct | 430 1.404651 .5704264 1 3 a_lt | 430 1.960465 .1950907 1 2 a_mc | 430 1.793023 .4056106 1 2 -------------+--------------------------------------------------------- a_spcra | 430 1.506977 .5005337 1 2 a_ped | 430 1.669767 .4708445 1 2 a_pedal | 430 1.986047 .1174345 1 2 a_roll | 430 1.923256 .2664952 1 2 a_polpur | 430 2 0 2 2 -------------+--------------------------------------------------------- a_posbac | 430 1.95814 .7436546 1 3 a_d15_19 | 430 1.865116 .3419972 1 2 a_d16_19 | 430 1.872093 .3343752 1 2 a_d15_20 | 430 1.8 .4004659 1 2 a_d16_20 | 430 1.806977 .3951308 1 2 -------------+--------------------------------------------------------- a_d65pls | 430 1.911628 .2841659 1 2 a_d21_24 | 430 1.788372 .4089382 1 2 a_d16_24 | 430 1.62093 .4857206 1 2 a_rd | 430 1.734884 .4419093 1 2 a_dist | 430 2 0 2 2 -------------+--------------------------------------------------------- a_drowsy | 430 1.990698 .0961107 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016