Correlation
Overview
In general, we find that students tend to confuse correlation in an everyday sense (association, relationship) with bias in a strict statistical sense (quantified measurement of the linear relationship between two quantitative variables). Research shows that this confusion is very frequently not resolved even after a student has completed an introductory course.
Student Notions
When presented with a prompt such as: "", student responses have been summarized into the following categories (in this case, categories are not exclusive):
 Statistical Notions
 Numerical measure of linear relationship between variables
 How close to a line points on a graph fall
 Colloquial Notions
 Two things sharing similarity or equivalence
 Two things that are related, associated, connected, linked, corresponding, etc.
 Two VARIABLES that are related, associated, connected, linked, corresponding, etc.
Activities
The following HILT activities have been designed to address student misconceptions regarding "Correlation" and have research that suggests they improve student learning:
Correlation Chorus
