Hi,   i have this simple problem that i am trying to solve with the proc surveyselect but I'm not able to obtain the desired results.   I have a dataset with 3 variables: Country (takes only two values EU, NON EU) Segment (takes 3 values Large,Medium,Small) and Dollar (amount of exposure).   The dataset has 10000 lines.   I would like to extract a random sample of 40 lines that has the same (or close to the same) distribution of the original sample in terms of Dollar.   I am using this code:   proc sort data=dataset; by Country Segment; proc surveyselect data =dataset out = samp1 method = pps sampsize=40 seed = 9876 ; strata Country Segment; size Dollar; run;   I get a sample of 40 records but the proportion of country and segment weighted by dollar are not the same at all with respect to the original sample.   Where am i wrong?   ... View more