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Statistics Exam 2 (1) Compatibility Mode out References Mailings Review View Help Tell me what you want to do -- E- -B.11Normal No Spac-Heading 1 Heading 2 Title Subtitle Paragraph Styles Show your work 10pts Independent t-test A biopsxchologist studies the role of the brain chemical serotonin in aggression. One sample of rats serves as a control group and receives a placebo. A second sample of rats receive a drug that lowers brain levels of serotonin. The researcher tests the animals by recording the number of aggressive responses each of the rats display. The data are presented below a. Does the drug have a significant effect on aggression? Use the alpha level of 05, two tails b. Use Cohens d to measure the effect size n-6 M-22 ss 108 n-6 M 14 ss- 180
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