42. In the situation of the preceding problem. consider the hypothesis of marginal homogeneity H' : Ps» = P+ j for all i, where P;+ = Li=IPij' P+j = Li- IPjj' (i) !he maximum-likelihood estimates of the pjj under H' are given by Pij = nj}!(l + >.o j - >.0). where the >.o's are the solutions of the equations Ljnj}!(l + >.o j - >.oj) = Ljnij/(1 + >.oj - >.o j)' (These equations have no explicit solutions .) (ii) Determine the number of degrees of freedom of the limiting xZ-distribution of the likelihood-ratio criterion.