Every high school graduate should be able to use data analysis and statistical reasoning to draw conclusions about the world. Two core statistical concepts for students to understand are the role of variability in measures and evaluating the effect of a variable. In the activity presented in this article, students investigate a scientific question that leads them to distinguish between natural and induced variability. The distinction leads students to making conclusions about which stimulus is most effective at drawing Madagascar hissing cockroaches (MHCs) out of the dark.