Question

Which sampling method is used when the population is divided into homogeneous groups (strata), and a random sample is taken from each group?

Q: Answer-Which sampling method is used when the population is divided into homogeneous groups (strata), and a...

Stratified Random Sampling The population is first divided into distinct, non-overlapping subgroups called strata that are homogeneous internally e.g., strata based on income level, region, profession. Then, a simple random sample is drawn from each stratum . This ensures representation from all important subgroups. Contrast Cluster Sampling divides the population into heterogeneous clusters e.g., city blocks, and a random sample of clusters is chosen, with all members in chosen clusters surveyed. Systematic Sampling picks every k-th member from a list. Convenience Sampling is non-random and based on ease of access.