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Variable centrée réduite


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Posted

Salut il me semble pas que le prof en a parlé mais dans le doute je fais un petit topo:

En gros centrer et réduire revient à se ramener à la loi normale d'espérance nulle et de variance 1, aussi notée N(0,1). 

Pour ce faire on utilise la formule suivante:

{\displaystyle x={\frac {X-\mu }{\sigma }}} où X est la valeur à centrer/réduire , \mu l'espérance et \sigma l'écart-type

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