A developmental psychologist investigated the influence of two crossed variables—exposure to televised violence and type of parental discipline—on teens’ acceptance of violence. He obtained a random sample of seniors at the local high school and classified them on two dimensions: (1) Whether or not their parents had restricted their television viewing and (2) Whether their parents used positive reinforcement or punishment. He took a random sample of six teens from each of the four samples (no siblings were included) and his dependent variable was each teen’s score on the interval-level Approval of Violence Scale (AVS). (Scores on the AVS range from 0 to 20, with higher scores indicating a greater acceptance of violence as a way to solve disagreements.) The cell means (and standard deviations) are shown below. SS_Rows was calculated to be 210.04, SS_Columns as 222.04, SS_Interaction as 15.04, and SS_Within as 204.83.