I need to show proof that r^2 is equal to R^2 given the defined r is the sample correlation between two vectors x and y.
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gung - Reinstate Monica
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I'm sure this is an answer in this site or math.stackexchange... This is a homework problem, maybe give your attempt? – SmallChess May 05 '17 at 07:05
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It has been answered [here](https://stats.stackexchange.com/questions/99669/the-equivalence-of-sample-correlation-and-r-statistic-for-simple-linear-regressi) – machazthegamer May 05 '17 at 11:56