Descriptive statistics

Basic statistical tools, they allow to describe a population in a crude way and to have guidance on the behavior of the variable studied. Introduction The approach of descriptive statistics is to describe a population or a sample of a population in a crude way. The...

Distribution graphs

They are the most used graphic representation for statistical studies. Introduction Even more than the others, the distribution charts, also called histogram (name given by Karl Pearson in 1895), are part of the statistics. Historically, they were used to represent...

Graphic analysis

The issue of graphic analysis is to facilitate the study and conclusions. Introduction ” a good sketch is better than a long speech ” Napoleon told us. There is the whole issue of graphic representation. It facilitates the sharing and understanding of...