Summary statistics for cholecystectomyper1000medicareen variable in 2009_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |        307    3.495537    .7504286       1.34       6.16

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