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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Let u(tilda) = $\displaystyle u_0$ and u(hat) = $\displaystyle u_1$. $\displaystyle \sum_{i = 1}^n (x_i - u_0) - \sum_{i = 1}^n (x_i - u_1) = n(u_1 - u_0)$.
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