The Statistics textbook had a very interesting example to introduce the concept of correlation analysis: one of the earlier forays into forensic science - when it was still in its infancy in the late 1800's - involved the study of a possible correlation between foot length and height of an individual. I elaborated on this example to introduce Jared to 'paired datasets'. During the lesson, Jared and I explored the idea of paired datasets, scatterplots, and what constitutes - visually - a strong positive or negative correlation versus no correlation.