Ekonometrika – bu:-?

Agar Y = V + W bо‘lsa, Cov(X, Y) aniqlovchi bandni kо‘rsating: ? :

{= Cov(X, Y) = Cov(X, V) + Cov(X, W);

77. 
    Agar Y = bZ (bu yerda b - konstanta) bо‘lsa, Cov(X, Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Cov(X, Y) = Cov(X, bZ) = bCov(X, Z);

78. 
    Agar Y = b (bu erda b-konstanta) bо‘lsa, Cov(X, Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Cov(X, Y) = Cov(X, b) = 0;

79. 
    Agar Y = V + W bо‘lsa, Var(Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Var(Y) = Var(V) + Var(W) + 2Cov(V, W);

80. 
    Agar Y = bZ (bu erda b-konstanta) bо‘lsa, Var(Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Var(Y) = b2Var(Z);

81. 
    Agar Y = b (bu erda b konstanta) bо‘lsa, Var(Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Var(Y) = 0;

82. 
    Agar Y = V + b (bu erda b-konstanta) bо‘lsa, Var(Y) aniqlovchi bandni kо‘rsating: ? :
    

{= Var(Y) = Var(V).

83. 
    Statistik prognozlashda qо‘llanadigan usulni kо‘rsating: ? :
    

{= Ekstrapolyasiya usuli;

84. 
    Kо‘p omilli chiziqli bog‘lanishni kо‘rsating: ? :
    

{= Y_x=a₀+a₁X₁+a₂X₂+…+a_nX_n

85. 
    Ekonometrik modelda qatnashadigan omillarni tanlashda qо‘llanadigan usulni kо‘rsating: ? :
    

{= Korrelyatsion tahlil usuli;

86. 
    Natijaviy kо‘rsatkich va unga ta’sir etuvchi omillar о‘rtasidagi bog‘lanish zichligini aniqlovchi koeffitsiyent: ? :
    

{= Korrelyatsiya koeffitsiyenti;

87.