Project #12506 - Biostatistics

Fernando et al. (2003) studied drug-sharing among injection drugs users in the South Bronx in New York City.  Splitting a bag – a practice where heroin is shared between two people after dissolving it in a common cooker prior to injection– is a known high risk factor for HIV exposure.  Interviews with drug users in a residential treatment facility provided the following information.

 

 Gender

Have you split drugs?

Total

Yes (Y)

No (N)

Male (M)

390

321

711

Female (F)

179

131

310

Total

569

452

1021

 

What is the probability that a person chosen at random will have split drugs?

 

 
 

 

 

 

 

 

 

What is the probability that a person chosen at random is not female?

 

 
 

 

 

 

 

 

 

What is the probability that a person has split drugs given they are a male?

 

 
 

 

 

 

 

 

What is the probability that someone chosen at random will be a female or will not have split drugs?

 

 

  

 

 

 

 

Given that someone has split drugs, what is the probability that they are female?

 

 
 

 

 

 

 

Subject Mathematics
Due By (Pacific Time) 09/16/2013 12:00 am
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