Karl Jones: Created page with "In statistics, a '''data point''' or observation is a set of one or more measurements on a single member of a statistical population. == Description =..."

2016-08-29T20:35:00Z

Created page with "In statistics, a '''data point''' or observation is a set of one or more measurements on a single member of a statistical population. == Description =..."

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In [[statistics]], a '''data point''' or observation is a set of one or more [[Measurement|measurements]] on a single member of a [[statistical population]].

== Description ==

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 values of income, wealth, age of individual, number of dependents. Statistical inference about the population would be conducted using a statistical sample consisting of various such data points.

In addition, in statistical graphics, a "data point" may be an individual item with a statistical display; such points may relate to either a single member of a population or to a summary statistic calculated for a given subpopulation.

The measurements contained in a data point are formally typed, where here type is used in a way compatible with datatype in computing; so that the type of measurement can specify whether the measurement results in a Boolean value from {yes, no}, an [[integer]] or [[real number]], the identity of some category, or some vector or array.

The implication of point is often that the data may be plotted in a graphic display, but in many cases the data are processed numerically before that is done.

In the context of [[statistical graphics]], measured values for individuals or summary statistics for different subpopulations are displayed as separate symbols within a display; since such symbols can differ by shape, size and color, a single data point within a display can convey multiple aspects of the set of measurements for an individual or subpopulation.

== See also ==

* [[Data]]
* [[Statistical population]]
* [[Unit of observation]]

== External links ==

* [https://en.wikipedia.org/wiki/Data_point Data point] @ Wikipedia.org

[[Category:Statistics]]

Data point - Revision history

Karl Jones: Created page with "In statistics, a '''data point''' or observation is a set of one or more measurements on a single member of a statistical population. == Description =..."