Understanding rsquared: A single point simplification

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Understanding r-squared A single point
simplification
Al Coons Buckingham Browne Nichols
School Cambridge, MA al_coons_at_bbns.org
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y
Error w.r.t. mean model
Error eliminated by y-hat model
Proportion of error eliminated by Y-hat model
Error eliminated by y-hat model

Error w.r.t. mean model
r2 proportion of variability accounted for by
the given model (w.r.t the mean model).
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y
Error w.r.t. mean model
Error eliminated by y-hat model
Proportion of error eliminated by Y-hat model
Error eliminated by y-hat model

Error w.r.t. mean model