A simple random sample is a group selected from a larger population where every individual has an equal chance of being chosen. This type of sample aims to fairly represent the whole population ...

The sample size of each stratum is proportionate to the population size of the stratum with proportionate stratification. This type of stratified random sampling is often a more precise metric ...

The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important. Fresh ...

and cluster sampling are other types of sampling approaches that may be used instead of simple random sampling. Researchers can create a simple random sample using a couple of methods. With a ...