Paper 1 · Research Aptitude
The type of sampling in which each person in the population has an equal chance of being selected is
AProbability sampling ✓ Correct
BNon-probability sampling
CJudgement sampling
DConvenience sampling
Correct answer: (A) Probability sampling — Sampling where each person has an equal chance of selection is probability sampling, so that is the answer.
Explanation
★Sampling where each person has an equal chance of selection is probability sampling, so that is the answer.
★In probability sampling every member of the population has a known, non-zero chance of being chosen.
★When that chance is equal for all, the sample is drawn purely by chance, which is probability sampling.
★Non-probability sampling does not give every member a known chance of selection.
★Judgement sampling selects cases by the researcher's own choice, not by equal chance.
★Convenience sampling takes whoever is easy to reach, so equal chance of selection is probability sampling.
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