(a) Separately for male and female students, perform the Wilcoxon test to determine whether there is a significant increase in heart rate from baseline to the prequiz measurement. Also, test the difference between the pre- and postquiz measurements. Compare your results to those you obtained in Computer Exercise 5 in the previous chapter, if you did the advanced part of the exercise; otherwise, perform the Wilcoxon test on the entire group (males and females included), and then compare to the previous chapter.

(b) Repeat part (a) for the anxiety scores.