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If the mean of the observations x1, x2....,xn is ,
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If the mean of the observations x1, x2....,xn is ,

If the mean of the observations x1, x2....,xn is ,-example-1
User Chu Son
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Hello,


\sum_(i=1)^n\ ( x_(i) -\overline{x})\\ =\sum_(i=1)^n\ x_(i) -\ \overline{x}\ \sum_(i=1)^n\ 1\\ =n*\overline{x}- \overline{x}*n=0
User Johan Maes
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