[計量] GWD31-15回Q35
這題我跟朋友都解不出來~希望有點可以指點迷津^^"
GWD31-15回
Q35:
For what percent of those tested for a certain infection was the test accurate;
that is, positive for those who had the infection and negative for those who
did not have the infection?
(1) Of those who tested positive for the infection, did not have the
infection.
(2) Of those tested for the infection, 90 percent tested negative.
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Answer: E
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