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Variance, test statistiques

naplus

By naplus
in Biostatistiques

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naplus Zygote

naplus

Posted
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Bonjour

Pourquoi la variance de la loi normale que suit M pour les tests statistiques est égale à "s²/n", ça sort d'où ?

image.png.f4e9d8f257a697a0aeb8ed8d1d27775c.png

 

Merci d'avance

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