probaetvariablealea.py

Created by acrozak02

Created on May 25, 2021

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epreuve bernoulli de para p:
  experience aléatoire ayant 
  2 issus :l'une le succes S
  de proba p et lautre l'échec 
  Sbarre de prob 1-p
  
  Lorsqu'on repete n fois , de facon
  indépendante ,cette épreuve de 
  Bernoulli on obtient un schéma
  de bernoulli de parametres n et p
  
  dans un schema de bernoulli
  de para n et p la variable aleatoire
  X égale au nbr de succes obtenus au cours
  de n répétitions suit la loi
  binomiale de parametres n et p
  
  P(X=k)=(n/k)p^k(1-p)^n-k
  
  E(x)=np V(X)=np(1-p) et Q(X)=racine np(1-p)
  
  au moin 2 = P(X>=2)
  au moin 1 P(X>=1)
  
  E(aX+b)=aE(X)+b
  E(X+Y)=E(X)+E(Y)
  
  V(aX+b)=a^2V(X)
  Q(aX+b)=|a|Q(X)
  V(X+Y)=V(X)+V(Y)
  
  

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