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harmonic mean
Sign in to saveAlso known as subcontrary mean, HM, harmonic mean value, harmonic average
inverse of the average of the inverses of a set of numbers
~31 min read
Encyclopedic overview
In mathematics, the harmonic mean is a kind of average, one of the Pythagorean means.
It is sometimes used for ratios and rates such as speeds, and is normally used for positive arguments only.
Excerpted from Wikipedia’s “harmonic mean” article, available under the CC BY-SA 4.0 licence.