Reading 3.1.3 Q

$\DeclareMathOperator{\Var}{Var}$ $\DeclareMathOperator{\Cov}{Cov}$ $\DeclareMathOperator{\Span}{Span}$

These reading questions will help you understand “Assessing the Accuracy of the Model”.

1. Give meaning and formula definition:
   1. RSS
   2. RSE
2. What are the units of RSS? (Same as what else?)
3. To discuss: what is the purpose of the $n-2$?
4. What is TSS?
5. What are the units of $R^2$?
6. What is the interpretation of $R^2$? (What does it measure?)
7. There are two big picture reasons to keep …??? UNFINISHED
8. What is the difference between a confidence interval and a prediction interval?