Conditional probability questions PLEASE HELP :)

K

kookiekatie

New member
Joined
Feb 21, 2013
Messages
1
Suppose that a certain drug test at an athletic event is 99% correct for both users and non users. Suppose that 0.1% of athletes use the illegal drug. Compute the probability of a false positive result.



Suppose that the probability of getting pulled over for erratic driving is 60% in Berkeley and 40% in Reno. If you flip a coin to decide which city to visit, what is the probability that you will get pulled over?

Thank you :)
 
kookiekatie said:
Suppose that a certain drug test at an athletic event is 99% correct for both users and non users. Suppose that 0.1% of athletes use the illegal drug. Compute the probability of a false positive result.
Click to expand...
..........
 
Last edited:
kookiekatie said:
Suppose that a certain drug test at an athletic event is 99% correct for both users and non users. Suppose that 0.1% of athletes use the illegal drug. Compute the probability of a false positive result.



Suppose that the probability of getting pulled over for erratic driving is 60% in Berkeley and 40% in Reno. If you flip a coin to decide which city to visit, what is the probability that you will get pulled over?

Thank you :)
Click to expand...
Please show your work, or at least tell what you have tried - otherwise we don't know where you are getting stuck, or what tools you have to work with.

For the first one, can you tell us what "false positive" means?

What theorems do you know about conditional probabilities?
 
You must log in or register to reply here.
Top