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Determine Whether the Study Depicts an Observational Study or an Experiment

Question 99

Multiple Choice

Determine whether the study depicts an observational study or an experiment
-A researcher obtained a random sample of 100 smokers and a random sample of 100 nonsmokers. Afterinterviewing all 200 participants in the study, the researcher compared the rate of depression among thesmokers with the rate of depression among nonsmokers.


A) observational study
B) experiment

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