English, 23.09.2021 01:00 alexalvarez304

Studies have shown that many people will experience improvement in their condition even if they are given a sugar pill or some other treatment that is known to be worthless. This can be controlled by . * A. making the study double-blind.
B. using a placebo on the control group.
C. treating the two groups, experimental and control. exactly alike
D. testing the significance of the statistical difference between the two groups, experimental and control.

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Studies have shown that many people will experience improvement in their condition even if they are...