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djyliett [7]
3 years ago
12

Which type of research study is set up so that neither subjects nor investigators know which is the active group and which is re

ceiving a placebo?
a. Double blind
b. Clinical trial
c. Case control
d. Epidemiological
English
2 answers:
mojhsa [17]3 years ago
5 0
A) Double blind is the research study set up so that neither subjects nor investigators know which is the active group and which is receiving a placebo. 
Vladimir [108]3 years ago
5 0
The best answer to the question above would be letter a. A type of research study set up so that neither subjects nor investigators know which is the active group and which is receiving a placebo is a double blind type of research method.
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