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 115 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 following hypotheses.
Ho:u=115 ,Ha:=115
You give the SSHA to 25 incoming freshmen and find their mean score. Based on this, you reject at significance level = 0.01. Which of the following would be most helpful in assessing the practical significance of your results?
Question options:
Test the hypotheses again, this time using significance level = 0.001.
Report the P-value of your test.
Take another sample and retest just to make sure the results are not due to chance.
Construct a 99% confidence interval for to see the magnitude of the difference between 115 and your sample results.
