Corsi et al. (2007) conducted a study of the factors mediating whether injection drug users enter a drug treatment program. in their sample of 491 drug users, 38.1% were single; 27.5% were married or had a partner; and 34.4% were divorced, separated, or widowed. of the drug users who actually entered a treatment program, 67 were single; 66 were married or had a partner; and 61 were divorced, widowed, or separated. what kind of statistical chi-square test should corsi use to analyze the data?