P-values obtained from a paired t-test of adjusted Rand index from MCLUST and PUMA-CLUST. A paired t-test is performed for MCLUST and each of PUMA-CLUST results. The 10 simulated datasets in Figure 3 are used for each test. PC represents PUMA-CLUST results on the original simulated data. PC.01, PC.1 and PC.2 represent the PUMA-CLUST results on the datasets with added noise drawn from (0, 0.01), (0, 0.1) and (0, 0.2) respectively.