title1 'Customer Satisfaction Survey'; title2 'Stratified Sampling'; proc surveyselect data=Customers method=srs n=15 seed=1953 out=SampleStrata; strata State Type; run; Figure 63.5 displays the ...

Stratified Random Sampling – If you suspect there are unique differences between items in your population, you might use this ...

PROC SURVEYSELECT uses a fractional interval to provide exactly the specified sample size. The interval equals M h · / n h for stratified sampling and M / n for sampling without stratification.