4. Statistics and Probability

Linear Regression And Prediction — Quiz

Test your understanding of linear regression and prediction with 5 practice questions.

Practice Questions

Question 1

In a linear regression model, what does the line of best fit represent?

Question 2

What does a positive gradient in a regression line usually mean?

Question 3

A regression line is given by $y = 2x + 5$. What is the predicted value of $y$ when $x = 3$?

Question 4

What is an extrapolation in the context of regression?

Question 5

What does a correlation coefficient close to $1$ suggest about two variables?