Representative sampling and random sampling are two techniques ... these two methods allow for greater confidence in making statistical inferences from the sample in regard to the larger group.

Non-probability samples provide a challenging source of information for official statistics, because the data generating mechanism is unknown. Making inference from such samples therefore requires a ...

PROC SURVEYSELECT provides a variety of methods for selecting probability-based random samples ... selection bias and enables you to use statistical theory to make valid inferences from the sample to ...

Non-probability samples provide a challenging source of information for official statistics, because the data generating mechanism is unknown. Making inference from such samples therefore requires a ...