Paper 1 · Research Aptitude
Which of the following is an example of a random sampling method?
ATwo-stage random sampling ✓ Correct
BConvenience sampling
CPurposive sampling
DSnowball sampling
Correct answer: (A) Two-stage random sampling — Two-stage random sampling is an example of a random sampling method, so that is the answer.
Explanation
★Two-stage random sampling is an example of a random sampling method, so that is the answer.
★Two-stage random sampling selects at random in two steps, first clusters and then members within them.
★Since chance governs the selection at each stage, it is a random, probability method.
★Convenience sampling takes whoever is easy to reach, with no random basis.
★Purposive sampling selects by the researcher's judgement, again not random.
★Snowball sampling grows through referrals, so only two-stage random sampling is a random method.
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