Summary statistics for s3_1_c21_8 variable in snf_rollup2540_96_2004 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
  s3_1_c21_8 |          3    17.66667    11.71893          9         31

by Jean Roth , jroth@nber.org , 17 Feb 2018