Total number of clusters n 80 Number of clusters of size 1,2,3... n1=clusters of size 1,n2=clusters of size 2... n1 n2 n3 0 40 40 Number of exposed subunits over clusters of size 1,2,3... qplus1=Total # of exposed subunits for cluster of size 1, qplus2=Total # of exposed subunits for cluster of size 2... qplus1 qplus2 qplus3 0 40 60 Number of exposed sbunits by cluster size nq0=Number of cluster with 0 exposed subunit, nq1=Number of cluster 1 exposed subnit..,among clusters of a specific size Cluster Size nq0 nq1 nq2 nq3 0 0 0 0 0 1 0 0 0 0 2 16 8 16 0 3 12 8 8 12 Subunitspecific clustered Wilcoxon RankSum Test Unbalanced design ================= Estimated Probability That a Random Exposed Subunit Will Have a Higher Z statistic for P-value for Score Than a Subunit-specific Subunit-specific Random Standard Clustered Clustered Unexposed Deviation Wilcoxon RankSum Wilcoxon RankSum Subunit of Theta Statistic Z Statisic 0.46166 0.043997 -0.87134 0.38357