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If You Give 100 Sick People Tablets Similar to Echinacea

Question 14

Multiple Choice

If you give 100 sick people tablets similar to Echinacea but with no herb (called a placebo) , and do not tell them whether they are receiving the placebo or the Echinacea tablet, what kind of control would this be?


A) A positive control, since you are expecting a change to happen in this control group
B) A negative control, since you are expecting no change to happen in this control group
C) A blind control, since the sick people do not know whether they are receiving the placebo or the Echinacea
D) Both B and C are correct

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