Introduction (track)
by Chicago Transit Authority
Year: 1969
From the album Chicago Transit Authority (track #1)
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Introduction appears on the following album(s) by Chicago Transit Authority:
- Chicago Transit Authority (track #1) (this album) (1969)
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Condition: Good
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Condition: Very Good
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Condition: Brand New
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Introduction 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.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 01/13/2026 16:37 | alexandermause | 15,203 | 85/100 |
| ! | 12/15/2025 22:38 | Exist-en-ciel | 78,684 | 70/100 |
| ! | 11/20/2025 12:01 | plasmicmist | 7,586 | 91/100 |
| ! | 09/22/2025 21:44 |  AAL2014 | 35,510 | 76/100 |
| ! | 06/04/2025 16:53 | machiaj | 8,984 | 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 4% of all tracks on BestEverAlbums.com. This track has a Bayesian average rating of 81.4/100, a mean average of 81.0/100, and a trimmed mean (excluding outliers) of 82.2/100. The standard deviation for this track is 15.1.
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