Review problem-a placebo and a double-blind procedure

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Question: Is it possible for each of the following to be used in the same study (on the same units)? Explain or give an example of such a study.

a. A placebo and a double-blind procedure.

b. A matched-pair design and a retrospective study.

c. A case-control study and random assignment of treatments.

Reference no: EM131726031

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