14. Least Squares and Applications
Least Squares Approximation — Quiz
Test your understanding of least squares approximation with 5 practice questions.
Practice Questions
Question 1
What is the main goal of least squares approximation?
Question 2
For an overdetermined system $A x \approx b$, which quantity does a least squares solution minimize?
Question 3
If a data point lies exactly on the fitted model, what is its residual?
Question 4
When $A$ has full column rank, which equation must a least squares solution satisfy?
Question 5
What is the residual vector for an approximation $A x$ to $b$?