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Sampling Method is a
Techniques locate different respondents.
Types of sampling methods
Probability
random,
(+) Sampling frame
List of population
Equal Chance to be selected
Low BIAS
Non-Probability
Non-random
(-) Sampling frame
No list of population
No equal chance to be selected
High BIAS
Probability Sampling
Simple Random Sampling- Draw lots system, fish bowl techniques, lottery like.
Stratified Random Sampling - Divide population into strata or groups, and get representative from each group.
Cluster Sampling - Divide into groups/ cluster, and include all members of the selected group.
Multistage Sampling - Simple random sampling but done multiple times.
Systematic Sampling - “Every” nth of the list. Population Number divided by sample. Start randomly.
Non-Probability
Convenience/ Accidental: Whoever is available and willing to participate. (MOST COMMON)
Quota Sampling: Starts with convenience then sets limits.
Purposive/ Judgmental Sampling: Sets mental image or characteristics of a prospect respondents.
Snowball / Network Sampling: used for sensitive population; Via referrals/ Recommendation.
First Identified respondents: Seeds
Non-Proability: Snowball/ Network Sampling
Sampling Used for sensitive population; Via referrals/ Recommendation.
First Identified respondents: Seeds
Non-Probability: Purposive/Judgmental Sampling
Sampling Sets mental image or characteristics of a prospect respondents.
Non-Probability: Quota Sampling
Sampling Starts with convenience then sets limits.
Non-Probability: Convenience/ Accidental
Sampling Whoever is available and willing to participate.
Probability: Systematic Sampling
Sampling “Every” nth of the list. Population Number divided by sample.
Start randomly
Probability: Multistage Sampling
Sampling Simple random sampling but done multiple times.
Probability: Stratified Random Sampling
Sampling Divide population into strata or groups.
Probability: Cluster Sampling
Sampling Divide into groups/ cluster, and include all members of the selected group.
Probability: Random Sampling
Sampling Draw lots system, fish bowl techniques, lottery like.