Statistical unit

In statistics, a unit is one member of a set of entities being studied. It is the material source for the mathematical abstraction of a 'random variable'. Common examples of a unit would be a single person, animal, plant, manufactured item, or country that belongs to a larger collection of such entities being studied. In statistics, a unit is one member of a set of entities being studied. It is the material source for the mathematical abstraction of a 'random variable'. Common examples of a unit would be a single person, animal, plant, manufactured item, or country that belongs to a larger collection of such entities being studied. Units are often referred to as being either experimental units, sampling units or units of observation: