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Selecting random samples representative of the population is essential for research studies. Definitions, a checklist for conducting a survey, and examples of selecting stratified random samples are provided in this paper. Annotated examples shown determine sample size for each strata and stratify on 1, 2, and 3 variables. Before PROC SURVEYSELECT was available, the ranuni function with several data steps was used to obtain stratified samples.

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Format:PDFSize:40 KB
Date:Feb 2009
Pages:6

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