There's also another variance measure, which we use in the sample-- There's also another variance measure, which is for the sample.

还有另一个离散指标,我们用以考察样本,这是另一个离散指标,用于考察样本

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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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