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    Which of the Following Equations Is INCORRECT
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Which of the Following Equations Is INCORRECT

Question 71

Question 71

Multiple Choice

Which of the following equations is INCORRECT?


A) Cov(Ri,Rj) = Which of the following equations is INCORRECT? A)  Cov(R<sub>i</sub>,R<sub>j</sub>)  =   Σ(R<sub>i</sub> - R<sub>i</sub>) (R<sub>j</sub> - R<sub>j</sub>)  B)  Var(R<sub>p</sub>)  = x<sub>1</sub><sup>2</sup><sup>Var</sup>(R<sub>1</sub>)  + x<sub>2</sub><sup>2</sup><sup>Var</sup>(R<sub>2</sub>)  + 2X<sub>1</sub>X<sub>2</sub>Cov(R<sub>1</sub>,R<sub>2</sub>)  C)  Corr(R<sub>i</sub>,R<sub>j</sub>)  =   D)  Cov(R<sub>i</sub>,R<sub>j</sub>)  = E[(R<sub>i</sub> - E[R<sub>i</sub>]) (R<sub>j</sub> - E[R<sub>j</sub>]) ] Σ(Ri - Ri) (Rj - Rj)
B) Var(Rp) = x12Var(R1) + x22Var(R2) + 2X1X2Cov(R1,R2)
C) Corr(Ri,Rj) = Which of the following equations is INCORRECT? A)  Cov(R<sub>i</sub>,R<sub>j</sub>)  =   Σ(R<sub>i</sub> - R<sub>i</sub>) (R<sub>j</sub> - R<sub>j</sub>)  B)  Var(R<sub>p</sub>)  = x<sub>1</sub><sup>2</sup><sup>Var</sup>(R<sub>1</sub>)  + x<sub>2</sub><sup>2</sup><sup>Var</sup>(R<sub>2</sub>)  + 2X<sub>1</sub>X<sub>2</sub>Cov(R<sub>1</sub>,R<sub>2</sub>)  C)  Corr(R<sub>i</sub>,R<sub>j</sub>)  =   D)  Cov(R<sub>i</sub>,R<sub>j</sub>)  = E[(R<sub>i</sub> - E[R<sub>i</sub>]) (R<sub>j</sub> - E[R<sub>j</sub>]) ]
D) Cov(Ri,Rj) = E[(Ri - E[Ri]) (Rj - E[Rj]) ]

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