Multiple Choice
A group of cancer patients is divided into two groups. One group is given a new drug to fight the side effects of chemotherapy and the other group is given a placebo. After three months they are asked to respond to a questionnaire about the frequency and severity of their side effects to see whether the new drug improved the overall negative side effects of chemotherapy.
A) Controlled experiment
B) Observational study
Correct Answer:
Verified
Correct Answer:
Verified
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