The difference between stratified random sampling and cluster sampling is that in cluster sampling:
A. a researcher must be able to secure a complete listing of the potential sampling units that make up a defined target population.
B. the sampling units are divided into mutually exclusive and collectively exhaustive subpopulations.
C. the representativeness of a sample cannot be measured because sampling error estimates cannot be calculated.
D. a target population is separated into different groups.
E. a large number of respondents are interviewed in a relatively short time.
Answer: B
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