Summary statistics for cholecystectomyper1000medicareen variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |         52    4.674995    .7761295   2.922376   6.344408

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