Corsi et al $.(2007)$ conducted a study of the factors mediating whether injection drug users enter a drug treatment program $.$ One of the factors they explored was marital status $.$ The researchers found that $66$ of $135$ married $($ or partnered $)$ drug users entered a treatment program and $67$ of $185$ single drug users entered a treatment program $.$ They also found that the relative likelihood of entering a treatment program if a drug user is married is $1\mathrm{.}35.$ This means that : married drug users are $1\mathrm{.}35$ times more likely to enter a treatment program than are single drug users $.$ single drug users are $1\mathrm{.}35$ times more likely to enter a treatment program than are married drug users $.$ for every married drug user who enters a treatment program only $0\mathrm{.}35$ single drug users enter a treatment program O for every single drug user who enters a treatment program $,$ only $0\mathrm{.}35$ married drug users enter a treatment program