Harmonic Mean

The harmonic mean of real positive numbers x1,…,xn is definided as the number of numbers divided by the sum of the inverse of each number, as follow:

    \[\bar{X_{h}}= \frac{n}{\sum_{1}^{j} \left ( \frac{1}{X{i}} \right )}\]

We use harmonic mean when we are dealing with observations that are inversely proportional such as speed and time. The harmonic mean is particularly recommended for a number of values ​​that are inversely proportional as to calculate the average speed, average cost of goods.

See how to calculate the harmonic mean.

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