Paper 1 · Research Aptitude
The multi-stage cluster sample is most helpful when
AThere is wide geographical dispersion of the population
BThe researcher has time and money constraints
CThe researcher wants a probability sample in order to generalize the results
DAll of the above ✓ Correct
Correct answer: (D) All of the above — A multi-stage cluster sample is most helpful in all the listed situations, so the answer is all of the above.
Explanation
★A multi-stage cluster sample is most helpful in all the listed situations, so the answer is all of the above.
★It selects clusters in stages, sampling within chosen clusters step by step.
★So it suits a population that is widely spread over a large geographical area.
★It saves time and money, since only chosen clusters need to be visited.
★It remains a probability method, so the results can still be generalized to the population.
★Since each situation favours it, all of them together are correct.
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