Suppose a researcher is looking at a population of 180,000 people and wants to use a sample of 50,000 stratified by using age range. The researcher would use the formula: The same method is used ...

Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University ...

Save guides, add subjects and pick up where you left off with your BBC account. Stratified sampling is used to select a sample that is representative of different groups. If the groups are of ...

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, ...