Simple Random Sampling - A sample taken at random from a population, where every element in the population has an equal chance of being selected of data., Systematic sampling  - A sampling technique where a fixed interval (referred to as the sampling interval) is used to select participants or elements from a population, Stratified sampling - Where we divide the population into groups by some characteristic such as age or occupation or gender., Self selected sampling - Where participants voluntarily agree to be apart of a research study ,

Sampling Methods Match up

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