What is R-Squared (R^2) ... REALLY?

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What does it mean that X explains a certain percent of the variability in Y? Learn all about R^2.

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Very crisp and clear. Loved it! Thanks Brian!

PalakMJain
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This is the most amazing and simple explanation I've seen so far, good job mate.

coderide
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can you explain why is your intercept -500? the diagram shows that the intercept of the line should be positive. so why is it negative?

PriyankaRoy-rg
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Best explaination, i finally understand. Do you have video about R and it's relation to the R^2? I have seen the video of Veritasium about IQ where he shows the graph with regression and tell labout getting R^2 from R. I wanted to undrstand both, now i know what is R^2, R left.

СквозьГоризонт-мъ
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You should explain why the differences are Squared.

cybervigilante
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wow Thankyou Brian, very clear explaination

jann
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How is R different from r2? how do you interpret each?

death__ray
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At first I thought this was about R^2 like just the variable squared and not the regression coefficient. :-O

lidarman