Activity
50 people were given a diagnostic test for asthma (20 with disease, 30 without). 15 people with asthma had a positive test, whilst 5 people with asthma had a negative test. A negative test result was also found in 28 people without asthma. 2 people without asthma had a positive test result.
| Disease present | Disease absent | |||||
|---|---|---|---|---|---|---|
| Test positive | TP = 15 | FP = 2 | ||||
| Test negative | FN = 5 | TN = 28 | ||||
| Total | TP + FN = 20 | FP + TN = 30 | ||||
Using the numbers from the table, enter the correct values into the boxes to complete the formulas below.
| Sensitivity = | / | 75% | |||
| Specificity = | / | 93% | |||