
Variables aleatòries
Quiz
•
Mathematics
•
University
•
Hard

Carles Rovira
Used 6+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1/2
3
2
1/3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si P(X=-5)=P(X=5)=1/4 i P(X=10)=1/2, aleshores l'E(X) val
5
30/4
5/4
20/3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La probabilitat de guanyar a un joc determinat és de 0.33. Hi jugo 67 cops (amb independència). La probabilitat de no guanyar 34 vegades és:
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La probabilitat de guanyar en un joc és de 0.33. La probabilitat que el cinqué cop que hi jugui guanyi per primera vegada és
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si X és una variable uniforme discreta que pren valors als parells n tals que n ≥ 2 i n≤10, aleshores P(X<5) és
1/5
2/6
2/5
3/8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si X és una N(10,4) i Z és una N(0,1) aleshores P(X<30) és igual a
P(Z<5)
P(Z<10)
P(Z<2.5)
cap de les altres
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si X és una N(0,1) aleshores 3(X-2)+4 és una
N(2,9)
N(-2,9)
N(2,3)
N(0,9)
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