Stratified random sampling is a method of sampling that divides a population into smaller groups that form the basis of test samples.

A simple random sample is used to represent the entire data population. A stratified random sample divides the population into smaller groups based on shared characteristics.

This paper presents the results of a limited investigation which brings into focus the difficulties encountered in developing exact distribution-free methods for stratified simple random sampling. It ...

They concluded that systematic or stratified random sampling patterns are more effective than simple random sampling for bulk powder testing.

They concluded that systematic or stratified random sampling patterns are more effective than simple random sampling for bulk powder testing.

Within a survey of mountain forest types in the Swiss Alps, we compared three statistical sampling methods, i.e. stratified random sampling of the investigation area, systematic sampling and ...