Frequencies for first 10,000 rows of cholred variable in nhamcsopd1992 dataset : Cholesterol | reduction | couns/educ | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,907 99.07 99.07 1 | 93 0.93 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016