zone coefficient

例句：

1. 1.The coefficient of variation is used to measure the amount of variation in a dataset.
   变异系数用于衡量数据集中的变异量。
2. 2. The coefficient of determination explains how well a model fits the data.
   决定系数解释了模型对数据的拟合程度。
3. 3.The coefficient of correlation measures the strength of the relationship between two variables.
   相关系数衡量两个变量之间的关联强度。