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HEG Genève Statistiques IIDK Printemps 2019
Test blan 2019
Les al uls sont ee tués ave une pré ision d'au plus 4 hires après la virgules, ave arrondi
éventuel du dernier hire.
Problème : Piè es défe tueuses
Un fabri ant de piè es en produit des entaines de milliers. Il prétend qu'au plus 5% de ses
piè es sont défe tueuses. Un a heteur a besoin de 10 piè es. Pour disposer d'un nombre su
sant
de piè es non défe tueuses, il en ommande 12.
Question 1
Quelle loi de probabilité permet de al uler la probabilité du nombre de piè es non défe tueuses
dans la ommande ?
A. Loi binomiale
B. Loi de Poisson
C. Loi binomiale négative
D. Loi hypergéométrique
E. Au une des autres réponses
Question 2
Si l'a
rmation du fabri ant est valable, quelle est la probabilité que l'a heteur reçoive au moins
10 bonnes piè es ?
A. 0.4208
B. 0.6502
C. 0.9805
D. 0.1608
E. Au une des autres réponses
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