Population, The complete group being studied., Sample, A smaller group selected from the population., Sampling, The process of selecting a sample., Probability Sampling, Selection where members have a known/chance-based opportunity to be selected., Non-probability Sampling, Selection not based on random/chance selection of all population members., Sample Size, The number of participants/respondents included in the sample., Bias, A systematic influence that can make a sample unfair or unrepresentative.

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