Summary statistics for cholecystectomyper1000medicareen variable in 2002_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |         52    4.501382    .8286933   2.842527   6.269567

by Jean Roth , jroth@nber.org , 14 Mar 2018