False result rate is a property of the test. They're describing predictive value, derived from that rate and population statistics. https://en.wikipedia.org/wi

False result rate is a property of the test. They're describing predictive value, derived from that rate and population statistics. https://en.wikipedia.org/wiki/Positive_and_negative_predictive_values https://en.wikipedia.org/wiki/Positive_and_negative_predicti...