False Positive Rate

False Positive Rate (FPR) is the proportion of instances where a test incorrectly identifies something as positive when it is actually negative. In other words, it measures how often the test falsely signals a "yes" when the true answer is "no." For example, in medical testing, it’s the percentage of healthy people who are wrongly told they have a condition. A low FPR means fewer false alarms, making the test more reliable at correctly ruling out those without the condition. It helps evaluate the accuracy of a test in avoiding false positives.