2. Exploring Two-Variable Data
Residuals — Quiz
Test your understanding of residuals with 5 practice questions.
Practice Questions
Question 1
What is a residual in a linear regression setting?
Question 2
If a point has observed value $y=18$ and predicted value $\hat{y}=15$, what is the residual?
Question 3
A data point lies below the regression line. What can you say about its residual?
Question 4
Which description best matches a residual plot with points scattered randomly around $0$?
Question 5
Why do statisticians often examine residuals after fitting a regression line?