Question

2. A psychologist has developed a personality test on which scores can range from 0 to 200.  The mean score of well-adjusted people is 100.  It is assumed that the less well-adjusted an individual is, the more the individual’s score will differ from the mean value.  The Dean of Students at XYZ University is interested in discovering whether the students at XYZ are well-adjusted, on average. Fifteen students are randomly sampled. Their scores are:  80, 60, 120, 140, 200, 70, 30, 180, 70, 150, 20, 50, 170, 90, 130. Test whether the students are well-adjusted, on average, using alpha = .01. State your results in English.

Answer 1