Multiple Choice
If Z is a random variable generated by adding together X and Y which are also random variables,what do we know about var(Z) if X and Y are positively correlated.?
A) var(Z) = var(X) + var(Y)
B) var(Z) < var(X) + var(Y)
C) var(Z) > var(X) + var(Y)
D) var(Z) = var(X) * var(Y)
Correct Answer:
Verified
Correct Answer:
Verified
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