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)
Listen to The Great Unknown on YouTube
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 5 ratings for this track. | Show all 37 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| 11/18/2025 22:40 | mrmcrook | 11,773 | 78/100 | |
| 07/17/2025 12:10 |  doombringer | 13,892 | 74/100 | |
| 10/24/2024 10:24 | Siromynian | 16,624 | 70/100 | |
| 04/25/2024 10:56 | phmusic | 62,859 | 100/100 | |
| 04/19/2023 13:19 | Fertu | 40,975 | 82/100 |
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 77.1/100, a mean average of 77.4/100, and a trimmed mean (excluding outliers) of 77.4/100. The standard deviation for this track is 11.5.
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