CIMA BA1 · Chapter 9 · Question 8 of 11
A researcher divides a population of customers into groups by region and then selects a random sample from each region in proportion to its size. This sampling method is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: D) Stratified random sampling
Explanation
Stratified sampling divides the population into strata with a shared characteristic and takes a random sample from each, usually in proportion to the stratum size. Quota sampling is non-random selection within groups, cluster sampling selects whole groups, and systematic sampling picks every nth item from a list.
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