Topic 12: When things aren’t quite linear: Polynomial ...

ggplot(dataSet, aes(x=x, y=sqrt(y))) + geom_point() + geom_smooth(method="lm") 1. What is polynomial regression and why is it used? (4/6) Another more valid option would be to incorporate the curvature into the model specification. To do so, we can add a square transformation of x alongside of x in our regression equation: ................
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