A certain herb is said to be effective in
treating depression. A group of researchers
random...
Mathematics, 20.01.2022 23:50 Josias13
A certain herb is said to be effective in
treating depression. A group of researchers
randomly assigns 200 patients with major
depression to either take the herb or a
dummy pill that looked and tasted the same.
This is an example of
A An Obsenational Study
B. Contro ed Experiment
C. A survey
Answers: 2
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