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harmonic mean

American  

noun

Statistics.
  1. the mean obtained by taking the reciprocal of the arithmetic mean of the reciprocals of a set of nonzero numbers.


harmonic mean British  

noun

  1. the reciprocal of the arithmetic mean of the reciprocals of a set of specified numbers: the harmonic mean of 2, 3, and 4 is 3( 1/ 2 + 1/ 3 + 1/ 4 ) –1 = 3 6/ 13

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

harmonic mean Scientific  
  1. The reciprocal of the arithmetic mean of the reciprocals of a specified set of numbers.


Etymology

Origin of harmonic mean

First recorded in 1880–85

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Once we had those three numbers for each of the starting Super Bowl quarterbacks, we averaged them together using the harmonic mean rather than a simple average.

From Washington Post