When living in Ohio I briefly worked for a testing company that administered police and fire fighter promotion exams. One part of the exam was a timed running course. All candidates had to run first through a series of obstacles. They then had to race up stairs, hop over walls, and then drag a $175$ pound sandbag to safety. The people with the fastest times were selected to move on to the next stage of the interview process. Members of a protected class were less likely to get good scores on the exam and subsequently claimed discrimination. Review the data below to determine if there is evidence of discrimination. Based on the data, did the police exam cause discrimination?