QUESTION 1

The table below represents the results of a tuberculosis skin test on a group of people, some of whom have tuberculosis and some do not.





Has TB

Does not have TB

Positive Test

93

58

Negative Test

9

704



Remember these definitions of sensitivity and specificity from Lessons N.8 and N.9:



The sensitivity is the likelihood that a test correctly produces a positive result for those who should test positive. For example, with the PSA blood test, sensitivity is the likelihood that the test will give a positive result when cancer is actually present.



The specificity is the likelihood that a test correctly produces a negative result for those who should test negative. For example, with the PSA blood test, specificity is the likelihood that the test will give a negative result when cancer is actually absent.



What is the sensitivity of the tuberculosis test? (Round to the nearest tenth of a percent if needed.)