ML I, Week 6: Homework Questions

1. Explain the difference between true risk and empirical risk.
   Fill in the following table with "high", "medium", and "low":

   	emp. risk	true risk
   underfit
   good fit
   overfit

2. What is the tradeoff in chosing the split of the data into training and test set?
   How does cross-validation improve in this regard over the test set method?

due Monday, 2 Dec 2002