6. (6 points) Read about each study below and identify which variation of ANOVA should be performed: Factorial ANOVA, Mixed ANOVA, ANCOVA, MANOVA. If there is a covariate in the study, what is it? ~ a. Hawkeye wants to know if cognitive behavioral therapy helps to reduce depression more than antidepressant drugs. He recruits 200 young people with depression. He measures how often participants feel depressed. Then Hawkeye randomly assigns 100 participants to cognitive behavioral therapy and 100 participants to receive an antidepressant drug. He measures depressive symptoms again after 1 month, 3 months, and 6 months of therapy. ~ i. What type of analysis should Hawkeye use? ii. Covariate? b. Tony Stark is examining the efficacy of antidepressant and anti-anxiety medications for treating OCD. He randomly assigns participants to receive medication or a placebo. He then measures OCD symptoms with 2 measures: a measure of obsessive thoughts and a measure of compulsive behaviors.