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Two drugs are compared to see which of them is more likely to produce unpleasant side effects. Each of 100 subjects is given

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Answer #1

Answer:

a)

Design is completely randomized since it focuses on only the treatment (two different drugs) effects making it a single-factor experiment. The allotment of subjects is randomized.

b)

Design is matched pairs because by choosing each pair having the same value of the PCF, the effect of PCF, if any, is the same for both members of the pair and hence can be considered as identical entities. Consequently, the difference in the response variable for each pair becomes the statistic of concern.

c)

Design does not fit into any of the listed designs.

Clearly Design 2 is the best of the lot in terms of experimental error minimization. It recognizes the existence of PCF and also takes due care of that. The effect of PCF, if any, is nullified by pairing. Random assignment minimizes bias.

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