Overview
When we are given our data set of the from x1,x2,…,xn, we are interested in
measuring several characteristics of the data set. Typically, they are the location
(particular its center), and variability of the data set.
For a given set of numbers, x1,x2,…,xn, the sample mean x is given by
|
| (2.3.1) |
The sample median is obtained by first ordering the n observations from smallest to
largest, that means
 | (2.3.2) |