ORGANIZE DATA OF TWO DISTINCT BUT CLOSELY RELATED CONCEPTS OF REAL WORLD
A data model is a model that organizes two distinct but closely related concepts or elements of data and standardizes how they relate to one another and to the properties of real-world entities.
COLLECTION OF DATA
A data set is a collection of data. In the case of tabular data, a data set corresponds to one or more database tables, where every column of a table represents a particular variable, and each row corresponds to a given record of the data set in ANALYSIS