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Sampling without replacement

Definition

Sampling without replacement refers to the process of selecting individuals from a population in such a way that once an individual is selected, they are not put back into the population before the next selection.

Analogy

Imagine you have a bag of different colored candies. When you randomly pick one candy from the bag and don't put it back, you are sampling without replacement. This ensures that each candy can only be chosen once.

Related terms

Sampling with replacement: Sampling with replacement is when individuals are selected from a population and after each selection, they are put back into the population before the next selection.

Simple random sample (SRS): A simple random sample is a subset of individuals from a larger population where every individual has an equal chance of being selected. It is often used as a method for conducting surveys or experiments.

Stratified random sample: A stratified random sample involves dividing the population into subgroups or strata based on certain characteristics, and then taking a random sample from each subgroup. This helps ensure representation from all groups within the population.