The median length of stay for substance-abuse outpatient treatment completers is 107 days for those referred by the criminal justice system. The following data represent the length of stays for a random sample of substance-abuse outpatient treatment completers who were referred by an employer.
80 108 95 107 89 100
80 85 108 102 95 115
Using the Wilcoxon signed-ranks test at the αα=0.05 level of significance, does the median length of stay seem different for employer referrals than for those referred by the criminal justice system?
