standard deviation

名词 n.
中文释义

英文释义

名词 n.
  1. A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter σ (sigma).

词形变化

standard deviations plural

词源

Coined by English mathematician, biometrician, and eugenicist Karl Pearson in 1894 in his paper "On the dissection of asymmetrical frequency curves".
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