The next set of questions pertain to the following example: Amy wants to test whether people become more aggressive after viewing news reports that contain violence. She recruits a diverse sample of participants. To test her hypothesis, she randomly assigns participants into two groups. One group will view news clips regarding a recent string of robberies at gunpoint. The other group will view news clips that contain only information about a local election. Amy tests their levels of aggression by having participants rate their feelings on a 1-10 scale (10 being the most aggressive) before and after viewing the news clips.