Certified Blues (track) by ZZ Top
Year: 1971
From the album ZZ Top's First Album (track #7)
Certified Blues appears on the following album(s) by ZZ Top:
- ZZ Top's First Album (track #7) (this album) (1971)
- One Foot In The Blues (track #15) (1994)
- The ZZ Top Six Pack (track #7) (compilation) (1987)
- Raw ('That Little Ol' Band From Texas' Original Soundtrack) (track #11) (2022)
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Certified Blues 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 |
|---|---|---|---|---|
100/100  | 03/15/2024 05:09 | JoshN125 | | 96/100 |
80/100 | 04/11/2023 11:36 | LosWochos | | 80/100 |
75/100 | 10/22/2022 20:57 | Pluto11 | | 76/100 |
70/100 | 10/04/2022 14:07 | Fevernova | | 82/100 |
85/100 | 12/07/2021 14:53 |  Jboy56 | | 78/100 |
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 77.3/100, a mean average of 78.2/100, and a trimmed mean (excluding outliers) of 78.2/100. The standard deviation for this track is 10.3.
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