The first one is OK
In the second one, I have no idea what these B's are.
I did: Var((1-x)/2) = Var(0.5*(1-x)) = 0.25*Var(1-x) = 0.25*Var(-x) =
2. regression question: B(y/x) = -0.625 , B(x/y)=-0.4 . Find r.
-0.4 = r/s
Are these two correct ?
thanks a million !