4
QuizMultiple Choice

Calculating the Least-Squares Regression Line — Quiz

Question 4 • Statistical Reasoning

Using technology, the y -intercept is

Answer
A
4 point 5 , which means a student with no absences has a GPA of 4 point 5 .
B
3 point 7 9 , but it does not make sense to interpret the y -intercept in this context.
C
3 point 7 9 , which means a student with no absences is predicted to have a GPA of 3 point 7 9 .
D
4 point 5 , which means a student with no absences is predicted to have a GPA of 4 point 5 .

Explanation

The y-intercept is the model’s predicted GPA when the number of absences is 0. The technology gives an intercept of 3.79, so a student with no absences is predicted to have a GPA of 3.79. This is a prediction from the model, not a guarantee of the student’s actual GPA.

AI-written and checked against the verified answer.

Previous
Next