Population and Sample

For most measures of central tendency. whether the data comes from a sample or a population rarely affects the statistical process, that is, population mean and sample mean are calculated in the same way. However, when it comes to measures of spread, there are different formulas, that is, population variance and sample variance are calculated in different ways.

该议题描述了关于总体方差与样本方差的文档澄清。在代码库中查找方差计算函数，可能在 variance.py 或 central_tendency.py 等模块中。确定公式定义的位置，并添加注释或文档字符串来解释其区别。检查是否已有针对方差的测试，以确保解释与实现一致。

由索引模型根据 Issue 内容生成。