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E[sum x_i^2] - 2E[sum x_bar * x_i] + E[sum x_bar^2] = (n-1)sigma^2 What is the value of E[1/(n-1) * sum x_i - x_bar] ? If

E[sum x_i^2] - 2E[sum x_bar * x_i] + E[sum x_bar^2] = (n-1)sigma^2

What is the value of E[1/(n-1) * sum x_i - x_bar] ?

If E[Z -, X7] -26[EXX + E EN, X = (n - 1)02, what is the value of E 1 M-1 En ( X, - X)

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