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Math Help - variance proof

  1. #1
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    variance proof

    If X and Y share the same variance, prove that X+Y and X-Y are uncorrelated.

    Anybody have any idea how to do this?
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  2. #2
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    please see attached
    Sincerely
    hametceq
    p.s. By the way they have correlation coefficient ZERO, that's true I showed it, but this is not enough to claim that they are uncorrelated
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  3. #3
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    You're the man! Thank you!
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