Summary statistics for a7_3_c9_2 variable in hosp_rollup2552_96_2009 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a7_3_c9_2 | 430 499558.7 2961596 -3.74e+07 2.90e+07 by Jean Roth , jroth@nber.org , 21 Apr 2018