Hello. I am trying to prove the identity in red. (My failed attempt is in black)
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Originally Posted by incblue Hello. I am trying to prove the identity in red. (My failed attempt is in black) If you multiply out the numerator of the red LHS, then use the fact that $\displaystyle \sum{x_i}=n(mean)$ the result follows.
Originally Posted by Archie Meade If you multiply out the numerator of the red LHS, then use the fact that $\displaystyle \sum{x_i}=n(mean)$ the result follows. Thanks, it was easy after applying that.
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