Topic summary
Data points
Extracted from the Wikipedia article Unit of observation.
Data point
A data point is a set of one or more observed values on a single instance of the unit of observation. For example, in a study of the determinants of money demand with the unit of observation being the individual, a data point might be the set of values of income, wealth, age of individual, and number of dependents of a specific person. Statistical inference about the population would be conducted using a statistical sample consisting of various such data points.