A StatisticalPopulation is a set of instances of a certain given type that satisfy some set of constraints. The property [populationType](https://schema.org/populationType) is used to specify the type. Any property that can be used on instances of that type can appear on the statistical population. For example, a [StatisticalPopulation](https://schema.org/StatisticalPopulation) representing all [Person](https://schema.org/Person)s with a [homeLocation](https://schema.org/homeLocation) of East Podunk California would be described by applying the appropriate [homeLocation](https://schema.org/homeLocation) and [populationType](https://schema.org/populationType) properties to a [StatisticalPopulation](https://schema.org/StatisticalPopulation) item that stands for that set of people. The properties [numConstraints](https://schema.org/numConstraints) and [constraintProperty](https://schema.org/constraintProperty) are used to specify which of the populations properties are used to specify the population. Note that the sense of "population" used here is the general sense of a statistical population, and does not imply that the population consists of people. For example, a [populationType](https://schema.org/populationType) of [Event](https://schema.org/Event) or [NewsArticle](https://schema.org/NewsArticle) could be used. See also [Observation](https://schema.org/Observation), where a [populationType](https://schema.org/populationType) such as [Person](https://schema.org/Person) or [Event](https://schema.org/Event) can be indicated directly. In most cases it may be better to use [StatisticalVariable](https://schema.org/StatisticalVariable) instead of [StatisticalPopulation](https://schema.org/StatisticalPopulation).