# PRST - Table normale centree reduite ![](https://i.imgur.com/MXYR5ga.png) ![](https://i.imgur.com/PmdIvRn.png) ![](https://i.imgur.com/rzlmsgi.png) Si $P(Z\le-1,6)$: ![](https://i.imgur.com/VrLrcVu.png) $$ P(Z\le-1,6) = 1 - P(Z\le1,6) $$ :::info *Commencer passer d'une loi normale a une loi centree reduite ?* On a: $$ X\sim N(\mu,\sigma^2)\\ X-m\sim N(0,\sigma^2)\\ \frac{X-m}{\sigma}\sim N(0,1) $$ :::