standard deviation

短语

[化] 标准差; 标准偏差 [医] 标准偏差 [经] 标准离差, 标准偏差

发音

US

词形变化

standard deviations 复数 standard deviations

别名

std SD

释义与例句

n.
  1. 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).

    标准差

    数学

词汇关系

名词

上位词 1

variance

词源

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

来源：wiktionary