Bonjour de l'aide svp,

Les affirmations ci-dessous sont-elles vraies ou fausses?

1. Si X est une variable aléatoire telle que E (X) >0, alors toutes les valeurs prises par X sont positives.

2. Si X est une variable aléatoire telle que V (X) = 0 alors il existe un réel m tel que toutes les valeurs prises par X sont égales à m.

3. Si X est une variable aléatoire d'espérance mathématique nulle et prenant les valeurs a et b, alors b= -a
merci!

By: USER5185
25 Agustus 2025 mathematiques 5 minutes
4.5
500 views 500 comments 13 shares

Question

Grade: Education Subject: mathematiques
Bonjour de l'aide svp,

Les affirmations ci-dessous sont-elles vraies ou fausses?

1. Si X est une variable aléatoire telle que E (X) >0, alors toutes les valeurs prises par X sont positives.

2. Si X est une variable aléatoire telle que V (X) = 0 alors il existe un réel m tel que toutes les valeurs prises par X sont égales à m.

3. Si X est une variable aléatoire d'espérance mathématique nulle et prenant les valeurs a et b, alors b= -a
merci!
Asked by:
500 Viewed 500 Answers

Answer (500)

Best Answer
(41)
1. Vrai
2. Vrai si m=0
3. Faux 
Answered on 25 Agustus 2025

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