Roulette (track)
by Katy Perry
Year: 2017
From the album Witness (track #3)
Listen on Spotify
Roulette appears on the following album(s) by Katy Perry:
- Witness (track #3) (this album) (2017)
Upcoming concerts
Listen to Roulette on YouTube
Roulette ratings
where:
av = trimmed mean average rating an item has currently received.
n = number of ratings an item has currently received.
m = minimum number of ratings required for an item to appear in a 'top-rated' chart (currently 10).
AV = the site mean average rating.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
5/100  | 09/26/2024 07:32 |  DommeDamian | | 51/100 |
55/100 | 04/22/2023 15:03 | pinkfreud1981 | | 71/100 |
45/100 | 08/04/2020 18:44 | P8 | | 58/100 |
70/100 | 04/25/2020 16:25 | LosWochos | | 80/100 |
50/100 | 02/04/2020 23:03 |  nitomano | | 73/100 |
Rating metrics:
Outliers can be removed when calculating a mean average to dampen the effects of ratings outside the normal distribution. This figure is provided as the trimmed mean. A high standard deviation can be legitimate, but can sometimes indicate 'gaming' is occurring. Consider a simplified example* of an item receiving ratings of 100, 50, & 0. The mean average rating would be 50. However, ratings of 55, 50 & 45 could also result in the same average. The second average might be more trusted because there is more consensus around a particular rating (a lower deviation).
(*In practice, some tracks can have several thousand ratings)
This track has a Bayesian average rating of 63.1/100, a mean average of 54.3/100, and a trimmed mean (excluding outliers) of 54.3/100. The standard deviation for this track is 27.4.
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Roulette comments
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