相关系数概念剖析

摘要

We discussed two ways of understanding the most important concept in probability——the coefficient of correlation.We found it was related to the angle between two vectors in R2and also proposed a approach through which we could judge the correlation strength immediately and visually.%从两个角度——内积空间以及线性回归角度深入剖析了相关系数这一重要概念,将其与R2空间中向量之间的夹角联系起来,并且给出了一种迅速判断随机变量之间相关性强弱的方法,并通过随机模拟进行了直观展示.