Researcher.Life. "What Is Stratified Sampling? Definition, Types, and Examples." Yale University Department of Statistics and Data Science. "Sampling." Entropik Technologies. "Stratified Random ...

Consider the example in the section "Stratified Sampling". The study population is a junior high school with a total of 4,000 students in grades 7, 8, and 9. Researchers want to know how much these ...

If you omit the DATA= option, the procedure uses the most recently created SAS data set. For a nonstratified sample design, or for a stratified sample design with the same sampling rate in all strata, ...