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Table 1 Probability for positive data instance in UC1

From: The Matthews correlation coefficient (MCC) is more reliable than balanced accuracy, bookmaker informedness, and markedness in two-class confusion matrix evaluation

Before testing ϕ 0.001
Testing positive PPV 0.019
Testing negative 1 – NPV 0.00001
  1. The probability for a positive data instance, for example a patient that is truly sick, depends on the test result. While a positive test result increases the probability substantially, it remains low. A negative test result decreases it
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