Observational studies are research methods where the researcher observes and collects data on individuals without manipulating any variables.
Observational studies are like watching a soccer game from the sidelines without being able to control or influence the players' actions.
Surveys: A method of collecting data by asking questions to a sample of individuals.
Census: Collecting data from every individual in a population.
Retrospective Study: A type of observational study that looks back at past events or records to collect data.
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