sample correlation coefficient

例句：

1. 1. The researchers used a sample correlation coefficient to measure the relationship between variables.
   研究人员使用样本相关系数来测量变量之间的关系。
2. 2. The sample correlation coefficient was calculated using a statistical software package.
   样本相关系数是通过统计软件包计算出来的。
3. 3. The sample correlation coefficient was used to determine the strength and direction of the relationship between two variables.
   样本相关系数被用来确定两个变量之间强度和方向的关系。