Despite the rise of the social sciences in the last two centuries, we can not understand the advancement of humanistic studies if not through mathematics. The dichotomous excuse “science am / am of letters” has no place in the world of research. However humanist who is our domain, we can not ignore that mathematics is the code that describes the universe. Human behaviors are not case apart. In this article we will analyze the weight of normal, actually collected by Gauss and his famous curve of normal distribution or bell curve.