EntityQ1432581· pop 12· linked from 77 articlesproxySign in to savevariable used in statistics and experimental design: not in itself directly relevant, but that serves in place of an unobservable or immeasurable variableConnectionsgross domestic productEntitystatisticsEntityInternational Standard Book NumberEntitysocial scienceEntityintelligenceEntitydigital object identifierEntityvariableEntityeconometricsEntitybody mass indexEntitycorrelationEntityJSTOREntitydendrochronologyEntitystandard of livingEntitygrowth hormoneEntityquality of lifeEntityhuman heightEntitygradeEntitydependent and independent variablesEntityInternational Standard Classification of EducationEntityoperationalizationEntityCategoriesStatistical analysis