Question 1
In a linear regression setting, what does the residual for a data point represent?
Question 2
What does the correlation coefficient $r$ measure?
Question 3
Which statement about least-squares regression is true?
Question 4
If a regression line is $\hat{y}=12+3x$, what is the predicted value of $y$ when $x=4$?
Question 5
What does it mean if a point has a positive residual?
