Question

Suppose that X, Y and Z are jointly distributed random variables, that is, they are defined on the same sample space. Suppose also that E(X)=-2 E(Y) = - 8 E(Z)=- 4 Var(X) = 34 Var(Y) = 26 Var(z)=4. Compute the values of the expressions below:

E(2-2Z)

Answer 1

The value of E(2-2Z) is 10.

Step-by-step explanation:

Given that E(X) = -2, E(Y) = -8, and E(Z) = -4, we have:

E(2-2Z) = 2 - 2E(Z) = 2 - 2(-4) = 2 + 8 = 10

Therefore, the value of E(2-2Z) is 10.