Answer: There are probablistic and non-probablistic sampling techniques.
For the earlier, we have the simple random sampling, systematic sampling, stratified sampling and quota sampling
While for non probabilistic techniques- we have convenient sampling and purposive sampling amongst others
Explanation:
Depending on the sample size and the study, it becomes pertinent to to understand the objectives to enable choosing of a sampling techniques, such that the sample size is not bias and it reflects true population of the study.
For simple random sampling: you could make use of a ballot, mix it together then pick what you want for the study. This gives equal chance of participation.
For systematic, you could number your sample size and pick all even numbers or all numbers
Purposive and convenient sampling are the easy way out, though the sample size might be bias.
I hope this helps
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