The nose knows
Mar 07, 2021
2 minutes
by Marc Wilson
Late last year, Pennsylvanian psychology student Kate Petrova attracted media attention with her slightly odd analysis. Having recorded Amazon customer ratings for candles between 2017 and late 2020, she’d noticed a dip in the average rating for scented, but not unscented, candles that started in early 2020.
You’ll no doubt have worked out that this was
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