Consider the simple linear model, Y= alpha beta x e with eN(0, sigma _(e)^(2)) in usual notation. Prove that Var(hat( alpha ))=( sum_(i=1)^n x_(i)^(2))/( sum_(i=1)^n (x_(i)-( bar{x} ))^(2)) sigma _(e)^(2).

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Consider the simple linear model, Y= alpha   beta x e with eN(0, sigma _(e)^(2)) in usual notation. Prove that Var(hat( alpha ))=( sum_(i=1)^n x_(i)^(2))/( sum_(i=1)^n (x_(i)-( bar{x} ))^(2)) sigma _(e)^(2).

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(Solved): Consider the simple linear model, Y=\alpha \beta x e with eN(0,\sigma _(e)^(2)) in usual notat ...

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