What the only type of investigation that involves a control group?

asked Oct 23, 2018 186k views

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by Zerho

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2 votes

Experimental Investigation for Placebo Effect

Nick Cuevas answered Oct 25, 2018

6.3k points

4 votes

the answer is experimental. Thats the only investigation that involves a control group.

hope this helps

Japollock answered Oct 29, 2018

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