You have been asked to evaluate the quality of care given to heart-attack patients at the Emergency Room (ER) and Chicago Hope (CH). For the last month, you are given the following patient data:

Hospital (ER or CH)

Risk category (high or low)

Patient outcome (live or die)

Keeping in mind that high-risk people are less likely to survive than low-risk people, use this data to determine which hospital is doing a better job of caring for heart-attack patients.