For a standardized psychology examination the scores have a mean of 500 and a standard deviation of 98 it is about the size that the standard deviation oh of scores for the psychology majors on this exam is lower than 98 a random sample of 17 exams completed by psychology majors at a mean of 515 and a standard deviation of 73 assuming that the scores among psychology majors on this exam are approximately normal distribute it may we conclude that does 0.05 level of significance that the hypothesis is correct perform a one tailed test