📊Harmonic Mean Calculator
e.g. speeds: 60, 40, 120 km/h
The harmonic mean is the reciprocal of the arithmetic mean of reciprocals. It is the correct average for rates — when the denominator unit (time, distance) is constant.
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Fun Fact
The F1 score (harmonic mean of precision and recall) in machine learning uses the harmonic mean because it penalises extreme imbalance more severely than the arithmetic mean.
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