what is the sample in the case study Researchers wanted to test whether a new drug therapy results in a more rapid response in patients with major depression. They recruited 63 patients with a diagnosis of major depression. Patients were randomly assigned two treatment groups receiving either the placebo (31 patients) or the new drug (32 patients). The patients were measured using the Hamilton Rating Scale for Depression to determine the effectiveness of the drug. After collecting and analyzing data, it was determine that the new drug was effective