A simple random sample is a subset of a statistical population where each member of the population is equally likely to be chosen.

Simple random sampling – In this sampling method, each item in the population has an equal probability of getting selected in the sample. First, you must assign a unique identifier to each item.

In simple random sampling, each unit has an equal probability of selection, and sampling is without replacement. Without-replacement sampling means that a unit cannot be selected more than once.

Learn how simple random sampling works and what advantages it offers over other methods when selecting a research group from a larger population.

When you request stratified sampling with a STRATA statement, PROC SURVEYSELECT selects samples independently within strata. The selection probability for a unit in stratum h equals nh/Nh for ...