Harmonic mean

In mathematics, the harmonic mean (formerly sometimes called the subcontrary mean) is one of several kinds of average. Typically, it is appropriate for situations when the average of rates is desired. The harmonic mean is the number of variables divided by the sum of the reciprocals of the variables.
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Noun
1. the mean of n numbers expressed as the reciprocal of the arithmetic mean of the reciprocals of the numbers
(hypernym) mean, mean value
(classification) statistics

The Harmonic Mean is a "summary" statistic used in analyses of frequency data; it is computed as:
H = n * 1/ (1/xi)
where
n is the sample size.

B: (Matematika) purata harmonik
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Eng: harmonic mean
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