Summary statistics for cholecystectomyper1000medicareen variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |        307    4.856859    1.000116   2.922376   8.413216

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