This short lecture from Yale's online course Understanding Medical Research: Your Facebook Friend is Wrong tackles a basic but often misunderstood statistical idea: the average. The instructor walks through how mean, median, and mode all get casually labeled 'average' in news reports and social media posts, and why picking the wrong one can distort how a medical claim is understood. Using simple numeric examples, the lecture shows how a skewed distribution can make the mean misleading while the median stays representative, a distinction that matters when a headline cites an 'average' recovery time or drug effect. The segment is part of a series aimed at helping general audiences read health statistics critically rather than taking reported numbers at face value.