Once Upon A Time... (track)
by Chicago
Year: 1971
From the album Chicago III (track #20)
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Once Upon A Time... appears on the following album(s) by Chicago:
- Chicago III (track #20) (this album) (1971)
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Once Upon A Time... 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 track. | Show all 13 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 07/03/2026 16:08 | Johnnyo | 45,030 | 80/100 |
| ! | 01/04/2026 14:13 | Exist-en-ciel | 168,083 | 71/100 |
| ! | 08/11/2025 17:02 | machiaj | 9,085 | 74/100 |
| ! | 08/06/2024 15:01 |  DommeDamian | 75,714 | 51/100 |
| ! | 03/30/2024 02:09 | phmusic | 71,779 | 100/100 |
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 76.3/100, a mean average of 76.5/100, and a trimmed mean (excluding outliers) of 76.5/100. The standard deviation for this track is 15.1.
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