Posted: April 19th, 2017
A researcher conducted an experiment testing the effectiveness of three types of air fresheners (Stop Stank, Fresh Breeze, and Snorp) on odor control. The experiment was conducted in three identical testing rooms. A precise amount of the same odor was released into each room. Thirty participants were randomly assigned to one of the three groups. Once the participants were in the rooms, one of the three types of air fresheners was released into the room. Participants waited in the room for three minutes. Then participants were asked to rate the odor level of the room on a 10-point scale ranging from 0 (no unpleasant odor) to 10 (strong unpleasant odor).
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