[Epidemiological value of graphic representation of the Tukey test].

The method of Tukey shows a graphic view of a distribution of data around its median. This graphic representation is simple, easy, pertinent and computer-compatible. It optimizes the description of distribution of data (normal or free distribution). Usable with small size samples, the Tukey test is not very powerful, but robust, and authorizes a comparison of two or more medians with a risk of 5%.