Please note the following definitions: The prevalence of a disease is the proportion of individuals in a population or subpopulation who have a disease. The results for a diagnostic test for a disease will be called positive if the test classifies the subject as having the disease and negative if it does not. Please note that the test can be wrong and it can classify a subject as having the disease when the subject does not and vice a versa. The sensitivity of a diagnostic test is the probability of the test result will come up positive (for the present of a disease) if the person does indeed have the disease. (This could be signified by P(T+|D+) or called the “true positive” rate.). The specificity of a disease is the probability that the test will give a negative result if the subject does not have the disease.
Attachment:- 258745_1_hm1.pdf