Statistics 简明教程
Statistics - Arithmetic Median
算术中位数是一种位置平均值，指的是分布中的中间值。它通过先按升序或降序对各个项目进行排序，再确定中间值，从而将该数列分成两半，并用符号 $\tilde{X}$ 或 M 表示。
Arithmetic Median is a positional average and refers to the middle value in a distribution. It divides the series into two halves by first arranging the items in ascending or descending order of magnitude and then locating the middle value and is denoted by the symbol $\tilde{X}$ or M.
我们将讨论计算三种类型数列的 Arithmetic Median 的方法：
We’re going to discuss methods to compute the Arithmetic Median for three types of series:
Individual Data Series
当数据是以个体为基础给出时。以下是关于个体序列的一个例子：
When data is given on individual basis. Following is an example of individual series:
Items |
5 |
10 |
20 |
30 |
40 |
50 |
60 |
70 |