Suppose you have data that shows that 12% of athletes test positive for steroids. You also know that 11% of athletes test positive for steroids and actually use steroids. What is the probability that an athlete uses steroids, given that he tests positive?
Can anyone give me a hand?

Question

Suppose you have data that shows that 12% of athletes test positive for steroids. You also know that 11% of athletes test positive for steroids and actually use steroids. What is the probability that an athlete uses steroids, given that he tests positive?
Can anyone give me a hand?

mathmate · Answer

Have you done conditional probabilities?

anonymous · Answer

not yet but i think we'll be covering it next week

mathmate · Answer

Check this out, and post if you still have questions. https://www.mathsisfun.com/data/probability-events-conditional.html

anonymous · Answer

Okay thanks that helps a lot