A list of units or databases of all population members that defines inclusion and exclusion criteria for sampling

The entire group of individuals or units a researcher is interested in, also known as a parameter

A part of the population selected by a researcher, also known as a statistic, used to generalise results

A type of sampling where individuals do not have an equal chance of being selected, often based on specific criteria or volunteer participation

In simple random sampling, the characteristic where a selected unit can be chosen again in the same study

In simple random sampling, the characteristic where a selected unit cannot be chosen again once it has been selected

A type of sampling where every individual in the population has an equal chance of being selected for a study