variance • écart-type • variable aléatoire • Comprendre la formule et savoir l'utiliser

http://jaicompris.com/lycee/math/prob... Objectives: Understand where the formula for the variance of a random variable comes from and know how to use it and interpret the results. Understand where the formula for the standard deviation of a random variable comes from and know how to use it and interpret the results in terms of dispersion. Math lessons and exercises - probability