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A 60-Year-Old Patient Was Tested for Raven Disease; His Test

Question 3

Multiple Choice

A 60-year-old patient was tested for Raven disease; his test came back negative.However,he feels the test might be wrong and wants to know what is the probability of not having Raven disease given that his test came back negative.  Physician 1  Physician 2 Positive  Negative  Positive 4515 Negative 25165\begin{array}{r}{ \text { Physician 1 } }\quad\quad\\\begin{array} { | l | l | l | } \hline{ \text { Physician } 2 } \\\hline & \text { Positive } & \text { Negative } \\\hline \text { Positive } & 45 & 15 \\\hline \text { Negative } & 25 & 165 \\\hline\end{array}\end{array}
Using this table,answer to the following question: what proportion of the patients who tested negative are truly disease free?


A) 4%
B) 33%
C) 66%
D) 70%
E) 96%

Correct Answer:

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