OK，I must clear the concepts of those terms because this is the third time I review my notes.
Description of Data
If one wants to descript a collection of data, the Mode, Median and Mean are the first three terms to be learned. They are used to show the whole data in one parameter. And yes, one value is enough and the most important property of a dataset is the center. So where do the center come from? Here, our formula could be written as a …