Keep It Greasey (track)
by Frank Zappa

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Joe's Garage Act I, II & III (19 tracks)

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Keep It Greasey appears on the following album(s) by Frank Zappa:

• You Can't Do That On Stage Anymore, Vol. 3 (track #6) (1989)
• Joe's Garage Acts ll & lll (track #5) (1979)
• Joe's Garage Act I, II & III (track #14) (this album) (compilation) (1987)
• Zappa Picks - By Jon Fishman Of Phish (track #9) (compilation) (2002)

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Keep It Greasey 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 74.8/100, a mean average of 74.2/100, and a trimmed mean (excluding outliers) of 74.2/100. The standard deviation for this track is 27.6.

• Related links:
• Top tracks by Frank Zappa
• Top tracks of the 1980s
• Top tracks of 1987

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