Collaborate 11. A researcher would like to evaluate the effectiveness of a treatment program designed to reduce aggressiveness in domestic violence offenders. Prior to participating in the program, each of n = 8 participants has their aggressiveness rated on a scale from 1 to 10 by a clinical psychologist. After participating in the program, a second aggressiveness rating is recorded. The data are below. Using this information answer the questions below. Before After J H A W N CO 10 5 O W 7 Points Answer Possible Compute the mean for the sample of 1 - difference scores (MD). Compute the estimate for the 1 standard error (SMD) . Compute the t statistic. Do the results indicate that the program has a statically significant effect? Compute r2 and interpret the size of 1 the effect. Write up the results of the t test 1 following the American Psychological Association (APA) guidelines