sample covariance coefficient

例句：

1. 1. To calculatethe sample covariance coefficient, we need to first find the mean of each group and then compute the average of the differences between the means.
   要计算样本协方差系数，我们需要首先找到每个组的均值，然后计算均值之间的差异的平均值。
2. 2. The sample covariance coefficient is a measure of how much variation there is in the data when it is divided into smallergroups.
   样本协方差系数是衡量数据在分成更小的组时变异程度的一个度量。
3. 3. The sample covariance coefficient can be used to test hypotheses about the relationship between two variables by comparingthe observed correlation with the expected correlation based on the sample size and the distribution of the variables.
   样本协方差系数可以用来检验关于两个变量之间关系的假设，通过比较观察到的相关系数与基于样本大小和变量分布的预期相关系数来进行比较。