... = 2. 33 , µ Y = 1.83 , 2 = 0.555 , 2 = 0.4 72 X Y d) cov(X, Y) = 0.0139 , ρ(X, Y) = 0. 027 Bài 12 a) X PX Y PY 0. 125 0.375 0.375 0. 125 0. 125 0.375 0.375 0. 125 b) ρ(X, Y) = −1 , X Y ph thu c ch ... , 2 π π x ∉ − , 2 0.16 0. 12 0.08 0.04 Bài a) X PX 0.16 0.48 Y PY 0.6 0.4 b) 0.06 0. 02 0.045 0.015 0.03 0.01 0.015 0.005 0.36 Y 0.17 0.5 0.33 0.15 0.45 0.4 X X Y 0. 625 0. 625 0.56 ... −0.15 02 Bài 10 a) µ X = −0.467 , µ Y = , cov(X, Y) = , ρ(X, Y) = b) X Y c l p Bài 11 a) Y X 2 36 6 36 36 36 36 36 3 36 36 36 b) X PX Y PY 1 36 2 36 3 36 3 36 36 36 c) µ X = 2. 33 , µ Y = 1.83 , σ2...