A screening test for bureaucratic pomposity disorder (BPD) has reasonably good sensitivity and specificity, say 90% for
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- A screening test for bureaucratic pomposity disorder (BPD) has reasonably good sensitivity
and specificity, say 90% for both. (This means that, on average, nine out of every ten who
don't have BPD test negative.) Consider testing two different populations.
a. Officiousville has a population of 1000. Half the people in Officiousville have BPD.
Suppose everyone in Officiousville gets tests. Fill out a table to show how the test would
perform if you used it to screen Officiousville. Use it to compute PPV and NPV for this
test.
b. Mellowville has a population of 1000, but only 10 people in the whole town have BPD.
Fill out a table to show how the test would perform if you used it to screen Mellowville.
Use it to compute PPV and NPV for this test.
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