A market researcher wants to know which of two perfumes peop

A market researcher wants to know which of two perfumes people prefer: Ocean Breeze or Summer Rain. One hundred volunteers are selected. Each volunteer is blindfolded and then smells a sample of each perfume, one at a time. A coin flip determines which perfume is smelled first. The volunteer then indicates which one he or she prefers. At the end, the results are tallied. This setup is

an observational study.

a completely randomized experiment.

a matched pairs experiment.

a double blind experiment.

Solution

a completely randomized experiment. is the answer