Cos'è la tendenza centrale?

Characteristics of data such as central tendency, data variation, data distribution, extreme values, as well as the changing of characteristics of data over time, are important for better statistical analysis. 

Central tendency is a statistical measure to identify a single value typically, or uniquely, representative of the data. 

Mean, median, mode, and midrange are the four essential measures of central tendency. One can understand these by considering the quiz scores of a group of students.

Mean indicates the average value of the data. In this example, the mean is the average marks scored by the students. The median provides insight into the central value or midpoint of the data, which is obtained by rearranging the data in the increasing or decreasing order. 

The mode identifies the most repeated values in the data, or the marks secured by the maximum number of students. Finally, the midrange provides the midpoint between two extreme values—the average of the maximum and the minimum test scores. So, each measure of central tendency provides unique insight into data.