Soal SMA · Analisis · Kesulitan 3/5
A researcher wants to test the hypothesis that a new drug reduces blood pressure. She gives the drug to 50 patients and a placebo to another 50. Neither the patients nor the researchers know who gets which. This is an example of:
- A.Single-blind study
- B.Double-blind study
- C.Open-label study
- D.Observational study
Kunci jawaban & pembahasan
Jawaban: Double-blind study
When neither participants nor researchers know group assignments, it is a double-blind study.
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