random sampling procedurerandom sequencerandom type surveyingrandom valuerandom variablerandom variable generationrandom vectorrandom walkrandom walk modelrandomizationrandomizerandomizedrandomized block designrandomlyrandomnessrangerange finderrange findingrange limitsrange methodrange of a correspondencerange of a functionrange of a linear transformationrange of a variablerange of functionrange of mappingrange of relationrange of variablerange of variationsrangingrankrank biserialrank biserial correlationrank correlationrank correlation coefficientrank difference correlation coefficientrank differences chi squarerank of a abelian grouprank of a family of linear formsrank of a homomorphismrank of a linear mappingrank of a matrixrank of a quadric formrank of a system of equationsrank of an observationrank of linear transformationrank of matrixrank of system of linear equationsrank order statisticsrank sum test