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Data collected from real-world sources, including surveys, observations, interviews, administrative records, transactions, and other records of people, events, or phenomena. It is based on empirical evidence rather than being artificially generated. See also Synthetic data.
This is a type of categorical variable that contains values which represent categories which have a natural order. For example, a highest level of qualification variable might follow an order such as:
There is a logical order that the values assigned to the categories can be presented in.
Software that manages a computer’s hardware and applications by allocating resources such as memory, CPU, input/output devices, and file storage.
An outlier is an extreme value that differs greatly from other values in a set of values.
Source: Stat Trek Statistics Dictionary.