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VA Topic Six Homework - PSY 380, s X + X -> @ https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=26433269&tags=autosave#question3961615_26 . . . Seasonal affective disorder (SAD) is a type of depression during seasons with less daylight (e.g., winter months). One therapy for SAD is phototherapy, which is increased exposure to light used to improve mood. A researcher tests this therapy by exposing a sample of patients with SAD to different intensities of light (low, medium, high) in a light box, either in the morning or at night (these are the times thought to be most effective for light therapy). All participants rated their mood following this therapy on a scale from 1 (poor mood) to 9 (improved mood). The hypothetical results are given in the following table. Light Intensity Low Medium High Morning 5 7 8 3 4 7 7 9 5 9 Time of 6 8 Day Night 5 6 8 8 6 7 7 8 8 6 (a) Complete the F-table and make a decision to retain or reject the null hypothesis for each hypothesis test. (Round your answers to two decimal places. Assume experimentwise alpha equal to 0.05.) Source of Variation SS df MS F Time of day 1.00 X 1 |1.00 X 0.44 X Intensity 16.72 X 2 8.36 3.69 X Time of day x 1.17 2 0.58 0.26 X Intensity Error 68.00 X 30 2.27 Total 86.89 X 35 State the decision for the main effect of the time of day. O Retain the null hypothesis. Reject the null hypothesis. State the decision for the main effect of intensity. O Retain the null hypothesis. Reject the null hypothesis. State the decision for the interaction effect. O Retain the null hypothesis. O Reject the null hypothesis. (b) Compute Tukey's HSD to analyze the significant main effect. The critical value is * for each pairwise comparison. Type here to search O E W 8:26 PM 5/2/2021