Which statistical measure is calculated by dividing TRUE NEGATIVES by the sum of (True Negatives + False Positives)?

Specificity = TN ÷ (TN + FP). Specificity measures a test's ability to correctly identify those WITHOUT the disease (true negatives). A highly specific test has few false positives — when it's positive, it's likely a true positive. Memory: SPecificity = True Negative rate. Sensitivity = TP ÷ (TP + FN) = true positive rate. SNOUT/SPIN: Sensitive test Negative rules OUT; Specific test Positive rules IN.