A researcher wishes to compare the effectiveness of group therapy to placebo “antidepressants" (i.e., sugar pills that people think are antidepressants) on negative feelings associated with break-ups....

A) What are the Hypotheses (Be Specific) and what are the necessary pieces?

B). Calculate test statistic and critical values

Extracted text: A researcher wishes to compare the effectiveness of group therapy to placebo “antidepressants" (i.e., sugar pills that people think are antidepressants) on negative feelings associated with break-ups. He finds 22 people who went through a break-up in the last 2 weeks. He places half of them in a therapy group that meets every day for 2 weeks. He gives the other half the sugar “antidepressant" (placebo) every day for the same time. Unfortunately, he soon discovers that two participants from the Group Therapy session are now dating each other. Because he is worried that their data will not be representative of the effects of group therapy, he decides to remove their data from that sample. So now, the Group Therapy sample only includes 9 participants. The researcher thought that the effects of Group Therapy might be different from those of Placebo antidepressants, but he is not sure how. At the end of the 2 weeks of treatment, he asks all participants to rate their negative feelings on a scale of 1-100 (higher numbers indicate more sadness, grief, depression, etc.). He finds the average negative feelings for the Therapy group is 70 (SD=30) while the Placebo group has an average of 50 (SD=25).