8.14 How would you find the confidence-interval endpoints for the parameter of interest when the interval has confidence level nearest 0.90 and corresponds to

(a) The sign test with n¼11

(b) The Wilcoxon signed-rank test with n¼11

(c) The Wilcoxon rank-sum test with m¼5, n¼6 In each case define the function Z of the observations, give the numerical values of L and U for the order statistics Z(L) and Z(U), and give the exact confidence level.