A "probability sample" is a sample in which every element in the population has a known statistical likelihood of being selected.
What is probability sampling?
Probability sampling is a methodology in which the researcher selects samples from a broader population using a probability theory-based method. A participant must be chosen at random in order to be used as a probability sample.
Some key features regarding probability sampling are-
- The most important criteria for probability sampling being that each person in the population has an equal and known chance of being chosen.
- As the name implies, simple random sampling is a completely random method for choosing the sample.
- The sampling method is just as simple as randomly assigning to persons (sample) and then selecting at random from those numbers using an automated mechanism.
- Finally, the numbers chosen represent the members from the sample.
- Within that method of sampling, researchers chose samples in two ways: the lottery method and using numbers generating software/random number table.
- This sampling strategy is typically used on a significant population and has both advantages and limitations.
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