The example in the section "Stratified Sampling" assumes that the sample of students was ... Each study group contains between 2 and 4 students. Table 61.3 shows the total number of study groups for ...

The STRATA statement specifies variables that form the strata in a stratified ... Information" table, which includes values of the STRATA variables, and the number of observations, number of clusters, ...

For example, you might decide to randomly select ten items every hour from a production line. Stratified ... number tables, to select data points from the population. Random sampling is random ...