=+* 39. Clinical trials. An important challenge in clinical trials is patients who drop out before the trial is completed.

This can cost pharmaceutical companies millions of dollars because patients who have received a tested treatment for months must be combined with those who received it for a much shorter time. Can we predict who will drop out of a study early? We have data for 428 patients from a clinical trial of depression. We have data on their Age, and their Hamilton Rating Depression Scale (HRDS) and whether or not they completed the study (Drop 1 = Yes; 0 = No.

Completed the study).