The table on the right shows the results from looking at the diagnostic accuracy of a new rapid test for HIV in 100,000 subjects, compared to the reference standard ELISA test The rows of the table represent the test result and the columns the true disease status (as confirmed by ELISA) Answer the following questions HIV HIV Total Test 378 397 775 Test 2 98,823 98,825 Total 380 99,220 100,000 Find the sensitivity and specificity for this new test What do these values tell you about the test Find the positive and negative predictive values for the test What do they tell you Is this test good at confirming HIV, ruling out HIV, both, or neither How do you know

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Question: The table on the right shows the results from looking at the diagnostic accuracy of a new rapid test for HIV in 100,000 subjects, compared

The table on the right shows the results from looking at the diagnostic accuracy of a new rapid test for HIV in 100,000 subjects, compared to the reference standard ELISA test.

The rows of the table represent the test result and the columns the true disease status (as confirmed by ELISA).

Answer the following questions:

	HIV+	HIV-	Total
Test+	378	397	775
Test-	2	98,823	98,825
Total	380	99,220	100,000

Find the sensitivity and specificity for this new test. What do these values tell you about the test?
Find the positive and negative predictive values for the test. What do they tell you?
Is this test good at confirming HIV, ruling out HIV, both, or neither? How do you know?

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