To further examine this relationship, a psychologist obtains a sample of 15 adults who each do yoga at least 5 days a week. These participants were given a standardized stress questionnaire for which the general population has a known mean of 55. For our sample of adults, they had an average anger score of 52.9 with a standard deviation of 3.29. Does this group of 15 have significantly different stress scores than the general population? Test at = 0.01