調和平均

ちょうわへいきん

noun

•

harmonic mean(mathematics)

調	tune, tone, meter, key (music), writing style, prepare, exorcise, investigate, harmonize, mediate
和	harmony, Japanese style, peace, soften, Japan
平	even, flat, peace
均	level, average

とく

、

ちょうわへいきん

じっさい

しようれい

、「

へいきんそくど

」

おも

とあ

、

せつめい

お

つうれい

In particular, it is customary for actual examples of use of the harmonic mean to generally cover "average speed," and explain no further than that