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Nick11111 science forum beginner
Joined: 14 Feb 2006
Posts: 6

Posted: Thu Jun 15, 2006 1:04 am Post subject:
A Conditional Probability Question (Diagnstic Test)



A diagnstic test:
a person has the disease the test gives a positive result 99% of the
time
while an individual without the disease will show a positive result 2%
of the time
Let A be the event "test positive," and
B the "person really has disease."
Can I conclude the followings?
P(A  B) = 0.99, P(not A  B) = 0.01,
P(A  not B) = 0.02, P(not A  not B) = 0.98 

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Mike Terry science forum Guru Wannabe
Joined: 02 May 2005
Posts: 137

Posted: Thu Jun 15, 2006 6:01 pm Post subject:
Re: A Conditional Probability Question (Diagnstic Test)



"Nick" <chanlikhangnick@gmail.com> wrote in message
news:1150333475.220142.94960@y41g2000cwy.googlegroups.com...
Quote:  A diagnstic test:
a person has the disease the test gives a positive result 99% of the
time
while an individual without the disease will show a positive result 2%
of the time
Let A be the event "test positive," and
B the "person really has disease."
Can I conclude the followings?
P(A  B) = 0.99, P(not A  B) = 0.01,
P(A  not B) = 0.02, P(not A  not B) = 0.98

Yes. 

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