The Great Unknown (track)
by Iron Maiden
Year: 2015
From the album The Book Of Souls (track #3)
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The Great Unknown appears on the following album(s) by Iron Maiden:
- The Book Of Souls (track #3) (this album) (2015)
- The Book Of Souls: Live Chapter (track #9) (2017)
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The Great Unknown 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 39 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 07/31/2026 12:01 | timosbuecherei | 3,561 | 60/100 |
| ! | 07/13/2026 01:40 | Exist-en-ciel | 172,085 | 71/100 |
| ! | 06/10/2026 18:04 | Siromynian | 20,079 | 71/100 |
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 76.5/100, a mean average of 76.7/100, and a trimmed mean (excluding outliers) of 76.7/100. The standard deviation for this track is 11.9.
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