Intro to Statistical Learning (2nd Ed), Solution to Problem 10.5c

10.5C: In Table 10.2 on page 433, image.png we see that the ordering of the three methods with respect to mean absolute error is different from the ordering with respect to test set R2 . How can this be? Download Book: https://www.statlearning.com/ Authors' Lectures (R): https://youtube.com/playlist?list=PLoROMvodv4rOzrYsAxzQyHb8n_RWNuS1e&si=NP0wJ6RjP8XkxU7y Authors' Lectures (Python): https://youtube.com/playlist?list=PLoROMvodv4rPP6braWoRt5UCXYZ71GZIQ&si=0Z8tx4xlPLEyjZ70 https://colab.research.google.com/drive/16rgV6bj457Vlb7OgQsLPWT8p7REFVKUM?usp=sharing