Assuming that E[=1 X?] = n(2 + ?), that E[=1X2] = n (n + ?), and...

 

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Assuming that E[Σ=1 X?] = n(σ2 + μ?), that E[Σ=1X2] = n (n + μ?), and that Ε[Σ=1X Xi] = E[nX?] = n(= + μ?), please simplify Ε[Σ=1 X?] – 2E[Σ=1X X] + Ε[Σ=1X2]. Assuming that E[Σ=1 X?] = n(σ2 + μ?), that E[Σ=1X2] = n (n + μ?), and that Ε[Σ=1X Xi] = E[nX?] = n(= + μ?), please simplify Ε[Σ=1 X?] – 2E[Σ=1X X] + Ε[Σ=1X2].

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Lets start by using the linearity of the expectatio... View the full answer