A single sample t test was performed to determine whether there is any difference in anger between marines who participated in a month long intensive training program and a general population of male psychiatric outpatients. The established population mean on the anger scale for male psychiatric patients is 13.5.The results did not indicate a significant difference between groups, t(5)= -.337 p=.75 The 95% confidence interval ranged from -1.44 to 1.1. The means indicated that the marines who participated in the training program (M=13.3, SD=1.21) had no difference in anger than a general population of male psychiatric outpatients. Thus, the null hypothesis that there is no difference between marines and the general population of male psychiatric
