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方差和协方差方差和协方差two measures used in statistics. Variance is a measure of the scatter of the data, and covariance indicates the degree of change of two random variables together. Variance is rather an intuitive concept, but covariance is defined mathematically in not that intuitive at first. More about Variance […]
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Correlation vs Covariance Correlation and covariance are closely related concepts in theoretical statistics. They are important in determining the relationship between two random variables. What is Correlation? Correlation is a measure of the strength of the relationship between two variables. The correlation coefficient quantifies the degree of change of one variable based on the […]