This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
The validity of a test is based upon all except 
Select and explain. 
A. Sensitivity, B. Specificity, C. Precision, D. Accuracy
C: Precision
Answer: C: Precision 
Explanation: The term validity refers to what extent the test accurately measures which it purpos to measure. Accuracy refers the closeness with which measured values agree with true values.Validity has two components - sensitivity and specificity.Sensitivity and specificity, together with predictive accuracy are inherent propeies of a screening test.Park 23e pg: 138