=+ Use the Wilcoxon rank-sum test to decide whether true average bond strengths differ for the two adhesives. Hint: For these sample sizes, when H0 is true, P(w $

c) 5 .048 for c 5 36, .028 for c 5 37, and .008 for c 5 39. Furthermore, when H0 is true, the distribution of w is symmetric about n1(n1 1 n2 1 1)y2, so in this case P(w #

c) 5 .048 for c 5 19.