3 years ago

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

1 answer:

4 0

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

$

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Answer:

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