Simple random sampling

Definition

Simple random sampling is a type of random sampling where each possible sample size has an equal chance of being selected. It ensures that every combination of individuals has an equal probability of being chosen.

Analogy

Imagine you have different colored balls in a box, and you want to select some balls without bias. You close your eyes, mix them up well, and pick out balls one by one until you have your desired number. This way, you have a simple random sample of balls.

Related terms

Systematic sampling: Selecting every nth individual from the population to create a sample.

Convenience sampling: Choosing individuals who are readily available or convenient for the researcher.

Sampling variability: The natural variation that occurs when different samples are selected from the same population.