英语词汇“standard deviation”的翻译、意思、用法、释义-英汉经管词典

单词	standard deviation
释义	standard deviation A commonly used measure of dispersion, defined as the square root of the mean of squared deviations of a variable from its mean. Thus if x takes N different values, x_i, for i = 1, 2,…, N, and the mean is μ, the standard deviation is given by 0198607679.standard-deviation.1.jpg . If μ itself has to be estimated from the N observations, the best estimator for the standard deviation is 0198607679.standard-deviation.2.jpg .
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