Explain why each of the following is used in experiments. You may refer to an example in

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Explain why each of the following is used in experiments. You may refer to an example in the chapter if it makes it easier to explain.
a. Placebo treatments
b. Control groups

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Question Posted: Oct 22, 2015 03:11 AM

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Explain why each of the following is used in experiments. You may refer to an example in

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