Question: Solve 15. A researcher predicted that students' moods would increase after watching a cute animal video. The researcher recruited 10 college students for this study.

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15. A researcher predicted that students' moods would increase after watching a cute animal video. The researcher recruited 10 college students for this study. Upon entering the study, the researcher asked all participants for a mood rating. The researcher then had all participants watch a 5-minute cute animal video. Following the video, participants were asked to report their mood again. Mood was measured on a scale from 1 (terrible mood) to 10 (excellent mood). Use the data below to answer the following questions. Mood before video (X1) Mood after video (X2) a. Is the research hypothesis one-tailed or two-tailed? (1 point) Page 4 of 9 b. State the research hypothesis. (1 point) c. Calculate t using the appropriate test. Show all your work. (4 points) d. Write the results in APA. (2 points)

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