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【数学】variance & covariance

【数学】variance & covariance

作者: 盐果儿 | 来源:发表于2023-06-01 17:12 被阅读0次

    方差(Variance): Variance is a measure of how spread out a set of data points is around the mean (average) value. It quantifies the average squared deviation of each data point from the mean.

    标准差(Standard Deviation):Square root of variance

    期望(Expected Value):For a discrete random variable, the expected value is calculated by multiplying each possible value by its corresponding probability and summing up the products.

    协方差(Covariance): Covariance measures the relationship between two variables. It determines how changes in one variable are associated with changes in another variable.

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