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. GenderHave you split drugs?TotalYes (Y)No (N)Male (M)390321711Female (F)179131310Total5694521021ÂWhat 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 probablity that a person has split drugs given they are a male?WHat is the probablility that someone chosen at random will be a female or will not have split drugs?Given taht someone has split drugs, what is the probablity that they are female?Â