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Math Help - Explain the link

  1. #1
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    Explain the link

    Can anyone elaborate more about this:

    \sum_{i=1}^n Var(Y_i-\hat{Y}_i)+[E(Y_i-\hat{Y}_i)]^2=
    [Math]\sum_{i=1}^nVar[(Y_i-\overline{Y}-b_1(X_i-\overline{X}))^2][/tex]

    How is the 2nd term combine into the variance?

    To be more specified: This is the intermediate step in proving [LaTeX ERROR: Convert failed] in regression study. furthermore, [LaTeX ERROR: Convert failed]
    Last edited by noob mathematician; January 22nd 2010 at 05:21 AM.
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