correlation coefficient

例句：

1. 1.The correlation between the two variables is strong, indicating a strong relationship.
   这两个变量之间的相关性很强，表明它们之间有很强的关系。
2. 2.The correlation coefficient measures the strength of the relationship between two variables.
   相关系数衡量两个变量之间关系的强度。
3. 3. In this study, we calculated the correlation coefficient to determine the relationship between income and happiness.
   在这项研究中，我们计算了相关系数，以确定收入与幸福之间的关系。