j=left j=l justify=left justify=l not just=l ... View more

By default, the number of observations (actually N-1) is used for the denominator when computing a standard deviation. With your application, I suspect a more reasonable computation would divide the weighted deviations by the sum of the weights.  You can do this by using the VARDEF= option. The documentation for PROC MEANS contains a discussion of what quantity each computation estimates.   proc means data=example VARDEF=WGT; title "With VARDEF=WGT"; var x; weight w; run; title; ... View more