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Math Help - cleaning up an expression

  1. #1
    Junior Member
    Joined
    Nov 2009
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    73

    cleaning up an expression

    i need some help cleaning up this expression:


    [SUM(x(sub i) - u(tilda)) - SUM( x(sub i) - u(hat)) ] /(sigma)^2
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  2. #2
    MHF Contributor
    Joined
    Apr 2008
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    1,092
    Let u(tilda) = u_0 and u(hat) = u_1.

    \sum_{i = 1}^n (x_i - u_0) - \sum_{i = 1}^n (x_i - u_1) = n(u_1 - u_0).
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