SOCY 211 Lecture Notes - Lecture 9: Sample Size Determination, Effect Size, Null Hypothesis
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8. 1 populations for different study designs: study design populations. Ask yourself: if i repeat my sampling process man time, what does the collection of data represent? . The population is the group of all observation units that have non-zero probability of being included in your sample. Care of bias and non-independence: observational studies: Simple random survey: population is the group of all observation units that can be sampled. Cluster survey: population is the group of possible clusters. Stratified survey: each strata has a population. Population is the group of all observation units that can sampled within each strata. Case-control study: control and case both have a population. Cohort studies: population is the possible observations units that could be selected to be in the cohort: experimental studies: Control-treatment design: each control and treatment has a population. Population is the group of all observation units that can be sampled within the control and treatment.