Proportional stratified random sampling involves taking random samples from stratified groups in proportion to the population. The strata aren't proportional to their occurrence in the population ...

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 ...

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 ...

Suppose that the sample of students described in the previous section was actually selected using stratified random sampling. In stratified sampling, the study population is divided into ...

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 ...