randomization testrandomizedrandomized block designrandomized blocksrandomized complete blocksrandomized consent designrandomized gamma distributionrandomized modelrandomized stopped sum distributionrandomized testrank analysisrank analysis of covariancerank estimatorrank interactionrank likelihoodrank of matrixrank order statisticsrank sum testrank testranked setranked set samplingranking procedurerankitrao and scott testrao blackwell theoremrao blackwellizationrao distancerao scoring testrare event risk analysisrarefaction curveraterate of changerate of interestratioratio control methodratio correlationratio diagramratio estimatorratio of bivariate normal variablesratio of similarityratio of similituderatio testrationalrational laplace transformrational subgrouprationality criterionrayleigh distributionrayleigh quotientrealizationrearrangement of the terms in a series