Invitation (track)
by Helloween

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Keeper Of The Seven Keys Part 2 (10 tracks)

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Eagle Fly Free

Invitation appears on the following album(s) by Helloween:

• Keeper Of The Seven Keys Part 2 (track #1) (this album) (1988)
• Keeper Of The Seven Keys (Parts 1 & 2) (track #9) (compilation) (1993)

Listen to Invitation on YouTube

Invitation ratings

   Average Rating = (n ÷ (n + m)) × av + (m ÷ (n + m)) × AV
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 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 70.2/100, a mean average of 66.6/100, and a trimmed mean (excluding outliers) of 66.6/100. The standard deviation for this track is 21.0.

• Related links:
• Top tracks by Helloween
• Top tracks of the 1980s
• Top tracks of 1988

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