The ten most popular notes, their types (heart—H, base—B or top note—T), degrees and effect on number of perfume ratings.

We say that the note is of specific type if most of perfumes list it as a note of this type (some notes are “mobile” in this sense: a note listed as, e.g. a heart note in one perfume may be listed as a top note in another). Note that this classification does not create hierarchy in notes: for instance, it is not clear whether the base note is hierarchically superior to top note. The last three columns contain information about how influential the note is for the number of reviews perfumes receive. The size of this effect on perfume ratings is calculated using d of (2) (we used the standard notation to describe the effect size). To evaluate the validity of the result, we used the p-value of the permutation test. As the p-values show, we can confidently state their effect sizes except for Bergamot and Mandarin Orange. The effect sizes for the most popular notes are “small” at most. In our dataset, “medium” was the largest effect size of individual notes that was encountered. None of the top-10 most popular notes have such a large effect size.