Which sampling technique includes some cases from each segment of a population?

Which sampling technique includes some cases from each segment of a population?

• A. Quota Sample
• B. Purposive Sample
• C. Stratified Random Sample
• D. Cluster Random Sample

Answer: (A)

Quota sampling ensures representation from each segment of the population by setting specific quotas for characteristics like age, gender, or ethnicity and continuing data collection until all quotas are filled. This guarantees that every segment contributes to the final sample, though the selection within each quota is not random, which can introduce bias. Purposive sampling targets particular types of respondents and may skip some segments, so it doesn’t guarantee coverage. Stratified random sampling does aim to include each segment but does so through random selection within each segment, a probabilistic approach that differs from quota-driven filling of targets. Cluster random sampling gathers units from randomly selected clusters and doesn’t inherently ensure representation of every segment across the entire population.

Quota sampling ensures representation from each segment of the population by setting specific quotas for characteristics like age, gender, or ethnicity and continuing data collection until all quotas are filled. This guarantees that every segment contributes to the final sample, though the selection within each quota is not random, which can introduce bias. Purposive sampling targets particular types of respondents and may skip some segments, so it doesn’t guarantee coverage. Stratified random sampling does aim to include each segment but does so through random selection within each segment, a probabilistic approach that differs from quota-driven filling of targets. Cluster random sampling gathers units from randomly selected clusters and doesn’t inherently ensure representation of every segment across the entire population.