See mean.
The reciprocal of the mean of the reciprocals of a set of non-zero values. For values x1, x2,…, xn the harmonic mean, h, is given by
The harmonic mean H of n numbers (x1,…,xn) is defined by
The value of the harmonic mean is always less than the arithmetic mean and the geometric mean, and is less affected by large outliers.
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