Corsi et al.(2007) conducted a study of the factors mediating whether injection drug users enter a drug treatment program.One of the factors 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.What is the relative likelihood of entering a treatment program if a user is married compared to if he or she is single?
A) 0.36
B) 0.50
C) 1.35
D) 1.55

Question

Quizplus · Accepted Answer

The relative likelihood of entering a treatment program for married users compared to single users is calculated by dividing the proportion of married users who entered a treatment program by the proportion of single users who entered a treatment program. For married users, 66 out of 135 entered a treatment program, which is a proportion of 66/135. For single users, 67 out of 185 entered a treatment program, which is a proportion of 67/185. The relative likelihood is (66/135) / (67/185) = 1.35.

Corsi Et Al