Sampling is the process of selecting a representative subset of individuals objects or documents from a larger population for study so that findings can be generalized to the whole
Probability Sampling
Single random sampling
Systematic sampling
Stratified sampling
Cluster sampling
Multistage sampling
Every member has a known and non-zero chance of being selected
Non-probability Sampling
Convenience Sampling
Purposive sampling
Quota sampling
Snowball sampling
Selection is based on researcher's judgement rather than randomization
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