This case and its companion, "Studies in Managerial Judgment" (QA-0493), consist of exercises that demonstrate several cognitive biases that are likely to affect judgment in decision making. They complement a curriculum focused on the normative approach to decision analysis by demonstrating real-world examples of how decision making can be skewed. The cases cover four of the main categories of heuristics: representativeness, availability, anchoring, and framing and are intended for students who have developed expertise with decision-tree analysis. (A teaching note is available.)