Results for the GeneLogic Dilution Study. Mean, standard deviation, and MAD of the computed mRNA proportions with respect to the target SNB-proportions of 0.25, 0.5 and 0.75. The displayed values are averages across 5 replicas. The results were calculated using trimmed mean (t) normalized MAS-S probe set summaries. Additional normalization by stepwise local regression is indicated by lr (solid curves). The proportions were determined at 3000 and 2000 (lr) included genes.