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Helga [31]
3 years ago
14

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

Mathematics
1 answer:
Svetllana [295]3 years ago
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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