Hi could you solve the following and provide solutions (note that the ts are subscripts): LetE(xt) = 3, E(yt) = −0.5 and Cov(xt, yt) = −0.8. Calculate 3/4E(xtyt) Let error(t) be the error term of a regression where E(error(t)) = 0; and E(error(t)^2) = 0.25. Calculate var(error(t)).  Let var(xt) = 0.5, var(yt) = 0.4 and rho(x,y) = −0.8. Calculate Cov(xt, yt).

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Hi could you solve the following and provide solutions (note that the ts are subscripts):

LetE(xt) = 3, E(yt) = −0.5 and Cov(xt, yt) = −0.8. Calculate 3/4E(xtyt)

Let error(t) be the error term of a regression where E(error(t)) = 0; and E(error(t)^2) = 0.25.
Calculate var(error(t)). 

Let var(xt) = 0.5, var(yt) = 0.4 and rho(x,y) = −0.8. Calculate Cov(xt, yt). 

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