m2.py

Created by hugoperrierdavid

Created on April 02, 2024

641 Bytes

# Variable aléatoire discrète
  1) variable aléatoire
X = une variable aléatoire 
  
  2)Espérance mathématique
E(X) = p1 x x1 + p2 x x2 + p3 x x3.... 

  3)Coef binomiaux
Le nombre de chemin avec k succès parmis les n résultats obtenu est noté : 
(n)
(k)

Remarque (n|0) = 1 ; (n|n) = 1 : (n;1) n

  4)Loi Binomial
  
P(X=k) = (n|k) * p^k * q^n
 - Epreuve de Bernoulli
Elle comporte 2 issues donc le succès est "...."
avec p = P(S) = 0,03

 - Schéma de Bernoulli
On répète 10 fois cette expérience de manière 
identique et indépendante alors n = 10

Par définition X ~ B(10;0,03)

Soit X ~ B(n;p). Alors E(X)= m*p

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