概率分布标准偏差 standard deviation of probability distribution 概率分布的方差 variance of probability distribution 概率分布的卷积 convolution of probability distribution ..
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Central tendency is a measure of the center of a probability distribution of the-- Central tendency is a measure-- Variance is a measure of how much things change from one observation to another.
集中趋势用以描述,一组概率分布的中心,集中趋势...,而方差衡量的是,各个观察值之间的变化
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