Solving Tree Diagram Problem - Exam Missed

justinbaker · Oct 31, 2010

ok so what am i doing wrong here? this was the only question i missed on my exam, and its driving me crazy...

Tree diagram: 100,000 pet owners split into Bitten (Yes 95, No 99905); Yes branch splits into Bitten by their own pet (Yes 87, No 8). Text asks for parts a and b with probability of Bob's claim.

bpet · Nov 1, 2010

For (b) I'd have put (95+8-N)/100000 where N is the (unspecified) number of pet owners that are bitten by pets that are not their own and also bitten by their own pet.

themaestro · Nov 3, 2010

I would have thought he would be after P(Bitten by own pet|Bitten) which would be 87/95

bpet · Nov 3, 2010

Sounds reasonable. But now I think the answer is 95/103.

Solving Tree Diagram Problem - Exam Missed

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