Specificity is equal to the number of true negative tests over the number of true negatives plus false positives:
Spec = TN /(TN + FP)
Just in case someone needs a review Sensitivity is calculated by dividing the number of true positives, by the total number of all people who have the condition - the true positives and false negatives.
submitted by โm-ice(370)
Specificity is equal to the number of true negative tests over the number of true negatives plus false positives:
Spec = TN /(TN + FP)