In an effort to determine the effectiveness of light therapy to alleviate depression, you recruit a group of individuals who have been diagnosed with depression. The participants are randomly assigned to one of three groups: Group 1 will be the control group—members of this group will receive no light therapy. Members of Group 2 will get light therapy for 1 hour on even-numbered days over the course of 1 month. Members of Group 3 will get light therapy every day for 1 hour over the course of 1 month. After 1 month, all participants will complete the Acme Mood Scale, consisting of 10 questions; this instrument renders a score between 1 and 100 (1 = Extremely bad mood . . . 100 = Extremely good mood).
Data set: Ch 05 – Exercise 04B.sav
Codebook
Variable: Group
Definition: Group number
Type: Categorical (1 = No light therapy, 2 = Light therapy: even days, 3 = Light therapy: every day)
Variable: Mood
Definition: Acme Mood Scale
Type: Continuous (1 = Extremely bad mood . . . 100 = Extremely good mood)

a. Write the hypotheses.
b. Run each criterion of the pretest checklist (normality, homogeneity of variance, and n) and discuss your findings.
c. Run the ANOVA test and document your findings (ns, means, and Sig. [p value], hypotheses resolution).
d. Write an abstract under 200 words detailing a summary of the study, the ANOVA test results, hypothesis resolution, and implications of your findings.