調ちょう和わ平へい均きん

noun

harmonic mean

Mathematical term for the reciprocal of the arithmetic mean of reciprocals. Used in statistics and geometry.

• 調ちょう和わ平へい均きんは、速そく度どの平へい均きんを求もとめるときに使つかわれることがある。

  The harmonic mean is sometimes used to find the average speed.