Which model form will both have a discontinuity in the fitted curve and most likely overfit the data when predicting height from shoe size?

Which model form will both have a discontinuity in the fitted curve and most likely overfit the data when predicting height from shoe size?

• A. Piecewise linear with one knot
• B. Polynomial of degree four
• C. Piecewise cubic with two knots
• D. Gaussian process with a squared exponential kernel

Answer: (C)