名词
中文翻译：协方差比例
同义词：
['covariance', 'correlation coefficient']
例句：
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1. In statistics, covarianceis used to measure the relationship between twovariables.
在统计学中，协方差用于测量两个变量之间的关系。
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2. The correlationcoefficient measures the strength ofthe relationship between two variables.
相关系数用于测量两个变量之间的强度关系。
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3.Covariance is a statistical measure that helpsus understand how variables change together.
协方差是一种统计测量方法，帮助我们了解变量如何一起变化。