Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 516 1989 0 1989 1989 state | 516 42.99806 .0440225 42 43 county | 516 72.08333 1.892969 72 115 fatals | 516 1.052326 .3039775 1 5 st_case | 516 430261 408.0527 421734 430547 -------------+--------------------------------------------------------- a_crainj | 516 1 0 1 1 a_region | 516 2 0 2 2 a_ru | 516 1.51938 .5001091 1 2 a_inter | 516 1.831395 .3747657 1 2 a_relrd | 516 1.912791 1.353224 1 4 -------------+--------------------------------------------------------- a_intsec | 516 1.916667 .2766536 1 2 a_roadfc | 516 4.141473 1.90384 1 6 a_junc | 516 1.918605 .2807113 1 3 a_mancol | 516 1.70155 1.184068 1 5 a_rd | 516 3 0 3 3 -------------+--------------------------------------------------------- a_tod | 516 1.624031 .4888306 1 3 a_dow | 516 1.447674 .501623 1 3 a_hr | 516 1.908915 .2880095 1 2 a_ct | 516 1.352713 .5605237 1 3 a_lt | 516 2 0 2 2 -------------+--------------------------------------------------------- a_mc | 516 1.930233 .2550019 1 2 a_spcra | 516 1.50969 .5003912 1 2 a_ped | 516 1.618217 .4862952 1 2 a_pedal | 516 1.949612 .2189557 1 2 a_roll | 516 1.928295 .2582499 1 2 -------------+--------------------------------------------------------- a_polpur | 516 2 0 2 2 a_posbac | 516 2.215116 .8736955 1 3 a_d15_19 | 516 1.856589 .3508315 1 2 a_d16_19 | 516 1.858527 .3488469 1 2 a_d15_20 | 516 1.827519 .3781643 1 2 -------------+--------------------------------------------------------- a_d16_20 | 516 1.829457 .3764738 1 2 a_d65pls | 516 1.957364 .2022304 1 2 a_d21_24 | 516 1.835271 .3712955 1 2 a_d16_24 | 516 1.678295 .467584 1 2 a_dist | 516 1.996124 .0621968 1 2 -------------+--------------------------------------------------------- a_drowsy | 516 1.99031 .0980544 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016