A regression line from a sample of high-school students shows that the association between number of days drunk per month and achievement test scores is -5.5. Which of the following could be concluded from this result?
A) that students who drink once per month get scores 5.5 points higher than those who drink every day
B) that scores decrease by 5.5 points for every day drunk per month
C) that students who never drink score 5.5 on the test
D) that there is a moderate association between drinking and test performance

Question

Quizplus · Accepted Answer

The slope of -5.5 indicates that for each additional day drunk per month, the test score decreases by 5.5 points.

A Regression Line from a Sample of High-School Students Shows