1. Bardwell, Ensign, and Mills (2005) assessed the moods of 60 male US Marines following a month-long training exercise conducted in cold temperatures and at high altitudes. Negative moods, including fatigue and anger, increased substantially during the training and lasted up to 3 months after the training ended. Mean mood scores were compared to population norms for three groups: college men, adult men, and male psychiatric outpatients. Let's examine anger scores for 6 Marines at the end of the training: 14, 12, 13, 12, 14, 15.

1. The population mean anger score for college men is 8.9. Conduct the 5 steps of hypothesis testing for a single-sample t-test.

1. Calculate the test statistic to compare the Marine sample mean to the population mean anger score of 9.2 for adult men.

1. Calculate the test statistic to compare the Marine sample mean to the population mean anger score of 13.5 for male psychiatric outpatients.

1. What can we conclude overall about Marines' mood following high-altitude, cold weather training in comparison to college men, adult men, and male psychiatric outpatients?