2. Research conducted at the Indiana University School of Medicine has suggested that playing video games with violent themes can have an impact on the gamer's brain activity. Based on MRI scans, the researchers noticed signicant brain activity in adolescents who played violent video games for a half-hour period. This, however, begs the question of whether it was the game playing or the violent content that made the difference. To nd out, a new research team has a group of 8 volunteer teenagers each play a violent video game on one day and a nonviolent video game on another day. Here are the brain activity scores (the higher the number, the greater the stimulation) for the eight subjects under the two conditions: Violent Nonviolent Subject game game 1 9 7 2 7 7 3 10 8 4 6 6 5 7 5 6 6 7 7 8 6 8 9 7 Assess the impact of violent content by testing the difference between the two conditions with a .05 level of signicance