The choice of a sampling method for primary data collection depends on various factors, including the nature of the research, the characteristics of the population, and the research objectives. Here are some conditions in which different sampling methods may be suitable for primary data collection:
Stratified Sampling
• Heterogeneous Population: When the population can be divided into distinct subgroups (strata) that differ in certain characteristics, stratified sampling is suitable. This method ensures representation from each subgroup, leading to more accurate results.
Cluster Sampling
• Geographical Considerations:When the population is naturally grouped into clusters or geographical regions, cluster sampling may be appropriate. This method involves randomly selecting entire clusters for inclusion in the study.
Convenience Sampling
• Limited Resources: When resources (time, budget, personnel) are limited, convenience sampling may be chosen. This method involves selecting participants based on their availability or accessibility. While it may lack representativeness, it is quick and cost-effective.
Purposive Sampling
• Specific Characteristics: When researchers want to include participants with specific characteristics relevant to the research question, purposive sampling is appropriate. This method allows for the intentional selection of participants based on certain criteria.
Snowball Sampling
• Hard-to-Reach Populations:When the target population is difficult to identify or access, such as in studies involving marginalized or hidden populations, snowball sampling may be effective. Participants are recruited through referrals from existing participants.
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