#2731: K-Means Clustering

[Ponytail is standing on a podium pointing a stick towards a poster hanging behind her. The writings and figures on the poster are illegible. But there seems to be a large scatter plot at the top with a heading above it. Also a couple of tables beneath this. She addresses an unseen audience in front of the podium.]

Ponytail: Our analysis shows that there are three kinds of people in the world:

Ponytail: Those who use k-means clustering with k=3, and two other types whose qualitative interpretation is unclear.