Math industriel 2, Loi de prob et Poisson Flashcards

1
Q

Espérance

A

E(X) = μ = Σ xi * f(xi)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Variance

A

Var(X) = σ² = Σ (xi - μ)² * f(xi)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Écart-type

A

σ = √(Var(X))

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Standardisation, Loi normale Centrée réduite

A

Z = (X - μ) / σ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Fonction de masse de probabilité binomiale

A

P(X = k) = C(n, k) p^k (1-p)^(n-k)
–> E(X)=np et Var(X)=np*(1-p)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Distribution de probabilités

A

f(xi) = P(X = xi)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Loi de Poisson

A

P(X = k) = (λ^k * e^(-λ)) / k!
–> λ = E(X)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Approximation binomiale par Poisson

A

B(n, p) ≈ Poisson(λ = n * p)
–> λ = E(X)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Approximation binomiale par la normale

A

B(n, p) ≈ N(μ = n * p, σ²)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly