Lognormal Distribution
The harmonic mean ( H ) of a lognormal distribution is
where μ is the arithmetic mean and σ2 is the variance of the distribution.
The harmonic and arithmetic means are related
where Cv is the coefficient of variation.
The geometric ( G ), arithmetic and harmonic means are related
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“There is the illusion of time, which is very deep; who has disposed of it? Mor come to the conviction that what seems the succession of thought is only the distribution of wholes into causal series.”
—Ralph Waldo Emerson (1803–1882)