Which of the Following Equations Is INCORRECT

question 10

Multiple Choice

Which of the following equations is INCORRECT?

• A)Cov(Ri,Rj)= Σ(Ri - Ri)(Rj - Rj)
• B)Var(Rp)= x12Var(R1)+ x22Var(R2)+ 2X1X2Cov(R1,R2)
• C)Corr(Ri,Rj)=
• D)Cov(Ri,Rj)= E[(Ri - E[Ri])(Rj - E[Rj])]

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Definitions:

Variable Overhead

Costs of operation that fluctuate with production volume, such as utilities for machinery.

Direct Labor-Hours

The cumulative amount of time employees spend specifically on the creation of goods or services.

Variable Overhead

Costs that fluctuate with production volume, such as utilities or indirect materials, which are not directly tied to any single product.

Direct Materials

Basic substances that can be directly linked to the manufacture of particular products or services.