vv maskv n testv statisticvacancyvalidvalidationvalidation of simulation modelvalidityvaluevan der waerden testvan montfort otten testvan zwet tail orderingvandermonde convolutionvandermonde matrixvariabilityvariablevariables planvariancevariance analysisvariance comparisons based on permutation theoryvariance componentsvariance covariance matrixvariance dilationvariance functionvariance inflation factorvariance of a probability distributionvariance of a random variablevariance ratiovariance ratio testvariance ratio transformationvariance stabilizing transformationvariantvariatevariate difference methodvariationvariation diminishing propertyvariation of a curvevariation of constantsvariation of parametervariation ratiovariation reduction propertyvarimax methodvariogramvartia indexvasicek entropy based test of normalityvec operatorvectorvectorial datavenn diagram