16. Patients who are addicted to cocaine are sometimes using the drug to combat depression. As such, sometimes addicts are given antidepressant medications to prevent relapse. A three-year study compared the effects of two such medications, lithium and desipramine, along with a placebo for 72 cocaine
users wishing to break the habit. The patients were put into 3 groups of 24, and given 1 of the 3 treatments at random. This two-way table illustrates the results.
Treatment Relapse No relapse Total
Desipramine 10
Lithium
18
Placebo
20
Total
24 72
14
6
4
24
24
24
48
Among patients who did not relapse, which treatment was most effective, and what's its conditional relative frequency?