Image:HeightWeightExample.CorrectConversion.Cubic.Residuals.png

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[edit] Summary

In Linear_regression the example data gives heights in metres, but the original values were inches, and the conversion was bungled. Converting back to the original inches then converting correctly to metric removes the odd horizontal spacing. Scrutiny of the residuals from the resulting new quadric fit suggests a cubic curve, so why not try a cubic fit? These residuals result: y(i) - f(x(i))

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