Research Topics:

Quantitative Research | Sampling

Content Type:

Glossary

Epsem Sample Definition

An EPSEM (equal probability of selection method) sample is one in which the population elements have equal and non-zero probabilities of selection.

An equal probability of selection method, or EPSEM, sample is a technique in which each member of a population has an equal and known chance, or non-zero, probability of being selected for the sample. This method makes certain that the sample represents the characteristics of the entire population. It's widely used to determine participants in surveys, experiments and other forms of data collection. This method adds validity and reliability of findings because it seeks to eliminate selection bias, meaning certain segments of the population are not overrepresented or underrepresented in the sample. 

Who relies on an EPSEM sample?

Marketing researchers and professionals depend on the EPSEM sample method to reduce bias in sample selection and to ensure that study findings and insights are more generalizable to the entire population. 

Why should I care about an EPSEM sample?

Relying on an EPSEM sample in research increases the chances that insights drawn from students accurately reflect the preferences and behaviors of the entire base or population. What's more, this method ensures that data collected provides a more accurate basis for making business decisions.