Determine whether the study depicts an observational study or an experiment.
Question
Determine whether the study depicts an observational study or an experiment. – Q/A (Question and Answer)
Test Answer
Fifty patients with brain cancer are divided into two groups. One group receives an experimental drug to fight cancer, the other a placebo. After two years, the spread of the cancer is measured.
Answer:
The study is an experiment because the researchers control one variable to determine the effect on the response variable.
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