The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitudes, and study habits of college students. Scores range from 0 to 200 and follow (approximately) a normal distribution with mean and standard deviation = 25. You suspect that incoming freshman have a mean , which is different from 115, since they are often excited yet anxious about entering college. To verify your suspicion, you test the hypotheses
H0: = 115, Ha: 115.
You give the SSHA to 25 incoming freshman and find their mean score. Based on this, you reject H0 at significance level = 0.01. Which of the following would be most helpful in assessing the practical significance of your results?