A screening examination was performed on 250 persons for Factor X, which is found in disease Y. A definitive diagnosis for disease Y among the 250 persons had been obtained previously. The results are charted below:Results of Diagnosis
Test Results Disease Present Disease Absent
Positive for Factor X 40 60
Negative for factor X 10 140The specificity of this test is expressed as:
A.7%
B.56%
C.70%
D.80%
E.30%
6 years ago
Answer
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