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A group of experimenter want to test the effectiveness of a well-known and expensive brand of pain medication against the effectiveness of a lesser-known and cheaper brand. To prevent any expectations about brand effectiveness from influencing their experimental test, the researchers are likely to make use of _______

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Numenius

Answer: The double-blind procedure

Explanation:

 Double blind procedure is one of the study in which the participants and also the experimenters are basically blind from the knowledge about some crucial topics and also from the study.

 The double blind is basically refers to the procedure including the expectations and the hypotheses that plays an important role for preventing the useful study and also the demand charactertics.

According to the given question, the double blind procedure is one of the method that helps in prevent the expectations about the various types of brands effectiveness and also influencing from the experimental test.        

 Therefore, Double-blind procedure is the correct answer.  

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