1 Intervalle de confiance (5 points) 2 Couple discret (8 points) 3

95%
Y∼ N (0,1) Z∼χ2(n−1) Y
qZ
n−1
∼ T (n−1)
n−1 (X1,· · · , Xn)Xi∼∼ N m, σ2
Pn
i=1 Xi−1
nPn
j=1 Xj2
∼σ2χ(n−1)
X∼ N (0,1) P(X > 1.96) = 0.025
X∼ T (9) 9 P(X > 2.26) = 0.025
X∼ T (10) 10 P(X > 2.23) = 0.025
1 6
L1
L1+L2X=L1Y=L1+L2
(X, Y )
X=x x ∈ {1,· · · ,6}
E(Y|X)
Y=y
y∈ {2,· · · ,12}
E=e1=1
0, e2=0 1
M=0.8 0.1
0.2 0.9
µ
X1=e1X1=X2=X3=X4
X3X1=e1
X3X1∼ UEE
1
2