The scatter plot shows the relationship between the test scores of a group of students and the number of hours they spend on social media in a week:

part a: what is the group of points labeled a called? what is the point labeled b called? give a possible reason for the presence of point b. (3 points)
part b: describe the association between a student’s test scores and the number of hours spent on social media. (2 points)

Hi there!

Part A: Those groups of points that are circled and labeled A are called a correlation. In this case, the group of points represent negative correlation. The point that is labelled B is called an outlier, because it falls outside of the range of the other points. Point B may have been present like that, because while a person may spend a lot of time on social media, they might have understood the information very fast, or maybe they studied a bit on a different occasion.

Part B: Going back to part A, the graph represents a negative correlation. In this case, the more time spent on social media, the lower the test scores.