Hello everyone! I am looking for help with proving the following: Sum(xi - x_bar)(yi - y_bar) = Sum(xi- x_bar)yi Thanks in advance!
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Going through the sum, this boils down to showing that $\displaystyle \Sigma (x_i - \bar{x}) = 0$
Aaaaahhhrrgh Thank you so much! I cannot believe I did not see this! Thank you again!
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