Biostatistics & Research · single question
Which of the following is an example of an EXPERIMENTAL (interventional) study design?
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Correct answer: A. Randomized controlled trial
- A. Correct. In an RCT the investigator assigns the intervention—this is experimental.
- B. Cohort studies observe naturally occurring exposures (observational).
- C. Case-control studies look back at exposures (observational).
- D. Cross-sectional surveys observe at one time point (observational).
Note: Rebuilt from an open-ended prompt ('give three examples and describe the study type').
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