Sampling and Experimentation — Test

Question 1 • Statistics

Which of the following would benefit this experiment the most?

Answer

This experiment should be single blind. The subjects do not know which treatment they are receiving to control for the placebo effect, but the technicians need to know which group received which treatment.

This experiment should be single blind. The subjects know which treatment they are receiving but the technicians do not know which group received which treatment, so the response being measured is not affected.

This experiment should be double blind. Neither the subject nor the technician should know which group is receiving the new medication and which is receiving the placebo. This method would control for the placebo effect and prevent any effect on the response.

This experiment should not use blinding. It is unethical for the subjects not to know which treatment they are receiving, placebo or new medication, and for the technicians not to know which group received which treatment.

Explanation

A double-blind design keeps both subjects and technicians unaware of who receives the new medication or the placebo. This helps reduce the placebo effect and prevents technicians’ expectations from influencing how they measure or interpret the response. Therefore, the best choice is C, the double-blind experiment.

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