A researcher divides a population into urban and rural groups and randomly selects respondents from each group. Which sampling method is used?
Correct answer: B. Stratified sampling
- A. Cluster sampling
- B. Stratified sampling
- C. Systematic sampling
- D. Convenience sampling
Explanation
Stratified sampling divides the population into relevant subgroups called strata and samples from each one. In cluster sampling, entire groups or clusters are usually selected rather than individuals from every group.
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About Sampling and Estimation
Sampling covers population and sample, sampling frames, simple random, systematic, stratified, cluster and convenience methods, along with sampling and non-sampling errors. Estimation includes sample statistics, population parameters, point estimates, confidence intervals and margins of error, with attention to how sample size affects precision.
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