Harmonic Mean

Pronunciation: /hɑrˈmɒn ɪk min/ ?

A harmonic mean is a type of average. It is especially useful for rates and ratios. A rate is a value in one dimension divided by a value in another dimension such as kilometers per hour. The formula for the harmonic mean is:

H= n/(1/x1 + 1/x2 + 1/x3 + ... + 1/xn)
where xi is the ith value in the dataset and n is the number of values in the dataset.

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Harmonic Mean. 2010-10-25. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/h/harmonicmean.html.

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2010-10-25: Initial version (McAdams, David.)

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