3 CD Collector's Set
by Rihanna
(Compilation album)
Year: 2009
Release date: 2009-12-15
Overall rank: -
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3 CD Collector's Set track list
The tracks on this album have an average rating of 60 out of 100 (all tracks have been rated).
3 CD Collector's Set rankings
3 CD Collector's Set collection
Showing all 1 members who have this album in their collection
3 CD Collector's Set ratings
Average Rating = (n ÷ (n + m)) × av + (m ÷ (n + m)) × AVwhere:
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.
Showing latest 5 ratings for this album. | Show all 16 ratings for this album.
| Rating | Date updated | Member | Album ratings | Avg. album rating |
|---|---|---|---|---|
| ! | 04/25/2020 16:34 | LosWochos | 47,404 | 75/100 |
| ! | 02/29/2020 11:54 |  Tamthebam | 23,038 | 69/100 |
| ! | 01/06/2020 16:42 | NateAckles | 146 | 69/100 |
| ! | 06/16/2017 22:25 |  discojets1 | 1,078 | 80/100 |
| ! | 12/22/2016 20:07 |  Mountandrew | 458 | 58/100 |
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 albums can have several thousand ratings)
This album has a Bayesian average rating of 52.0/100, a mean average of 39.4/100, and a trimmed mean (excluding outliers) of 39.4/100. The standard deviation for this album is 32.1.
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