Chemistry Class (track)
by Elvis Costello And The Attractions
Year: 1979
From the album Armed Forces (track #11)
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Chemistry Class appears on the following album(s) by Elvis Costello And The Attractions:
- Armed Forces (track #11) (this album) (1979)
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Chemistry Class 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 3 ratings for this track. | Show all 73 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 06/15/2026 02:55 |  AAL2014 | 42,310 | 76/100 |
| ! | 05/07/2026 01:58 | stareaterogni0n | 6,819 | 69/100 |
| ! | 01/23/2026 18:44 | bonnequestion | 17,370 | 74/100 |
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 is rated in the top 7% of all tracks on BestEverAlbums.com. This track has a Bayesian average rating of 79.4/100, a mean average of 79.9/100, and a trimmed mean (excluding outliers) of 79.9/100. The standard deviation for this track is 10.3.
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