Refer to Exercise 15.65. Compute Spearman's rank correlation coefficient for these data and test H0 : no association between the rank pairs at the 10% level of significance.
Exercise 15.65
The table gives the scores of a group of 15 students in mathematics and art. Use Wilcoxon's signed-rank test to determine whether the median scores for these students differ
significantly for the two subjects.

Art-55 74 68 64 67 73 65 ti g 0 1 2 3 4 5 Art-53 8 4 4 5 5 5 7 M 22 37 36 38 42 58 58 60