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Sampling Terminology. Two Major Types of Sampling Methods. Uses some form of random selection. Requires that each unit have a known (often equal) probability of being selected. Selection is systematic or haphazard, but not random. Probability sampling. Nonprobability sampling.
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Two Major Types of Sampling Methods Uses some form of random selection. Requires that each unit have a known (often equal) probability of being selected. Selection is systematic or haphazard, but not random. Probability sampling Nonprobability sampling
Groups in Sampling Who do you want to generalize to?
Groups in Sampling The theoretical population
Groups in Sampling The theoretical population What population can you get access to?
Groups in Sampling The Theoretical Population The study population
Groups in Sampling The theoretical population The study population How can you get access to them?
Groups in Sampling The theoretical population The study population The sampling frame
Groups in Sampling The theoretical population The study population The sampling frame Who is in your study?
Groups in Sampling The theoretical population The study population The sampling frame The sample
Where Can We Go Wrong? The theoretical population The study population The sampling frame The sample
Where Can We Go Wrong? The theoretical population The study population The sampling frame The sample
Where Can We Go Wrong? The theoretical population The study population The sampling frame The sample
Where Can We Go Wrong? The theoretical population The study population The sampling frame The sample