Researchers aim to study the relationship between pediatric age groups and obesity. The study includes multiple objectives and more than three diagnostic categories for obesity. What is the most appropriate statistical test to use?

A physician recommends a medication that is more expensive. It is later revealed that the physician was paid to give a lecture at a conference sponsored by the pharmaceutical company that manufactures the drug. What is the main ethical concern?

A pregnant woman is scheduled for an elective cesarean section. On the day of surgery, she expresses hesitation and is no longer sure she wants to proceed. What is the most appropriate next step?