normal curve of distribution

例句：

1. 1.The normal distribution curve shows the typical shape of a population's data.
   正态分布曲线显示了人口数据的典型形状。
2. 2.The normal distribution curve is used to describe the distribution of a population's characteristics.
   正态分布曲线用于描述人口特征的分布。
3. 3. The normal distribution curve helps us understand how different variables affect each other.
   正态分布曲线有助于我们理解不同变量如何相互影响。