Stratified Random Sampling – If you suspect there are unique differences between items in your population, you might use this sampling strategy to ensure you get a balanced representation of the ...

The example in the section "Stratified Sampling" assumes that the sample of students was selected using a stratified simple random sampling design. This example shows analysis based on a more complex ...

PROC SURVEYSELECT selects samples independently within strata. The selection probability for a unit in stratum h equals n h /N h for stratified simple random sampling. PROC SURVEYSELECT uses Floyd's ...