Data point

Data point

In statistics, a data point is a set of measurements on a single member of a statistical population, or a subset of those measurements for a given individual. 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.

Discussion

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 colour, a single data point within a display can convey multiple aspects of the set of measurements for an individual or subpopulation.

See also

  • Data
  • Unit of observation

Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Data Point —   [dt. Datenpunkt], Diagramm …   Universal-Lexikon

  • data point — noun a) A mark on a graph or chart corresponding to a piece of data. Could you make all the yellow data points bigger? b) the data that the mark represents. I think the third data point is inaccurate. Lets measure it again …   Wiktionary

  • data point — unit of information usually used in creating graphs …   English contemporary dictionary

  • data point — noun an item of factual information derived from measurement or research • Syn: ↑datum • Hypernyms: ↑information • Hyponyms: ↑reading, ↑meter reading, ↑indication, ↑statistic …   Useful english dictionary

  • Service Data Point — is the node in the IN GSM which is responsible for providing subscriber information. GSM network elements that needs information about subscriber interrogate the SDP about such information.The operator has to define all the rate plans in SDP. The …   Wikipedia

  • Data transformation (statistics) — A scatterplot in which the areas of the sovereign states and dependent territories in the world are plotted on the vertical axis against their populations on the horizontal axis. The upper plot uses raw data. In the lower plot, both the area and… …   Wikipedia

  • Data — For data in a computer science context, see Data (computing). For other senses of the word, see Data (disambiguation). See also datum, a disambiguation page. The term data refers to qualitative or quantitative attributes of a variable or set of… …   Wikipedia

  • Data Smoothing — The use of an algorithm to remove noise from a data set, allowing important patterns to stand out. Data smoothing can be done in a variety of different ways, including random, random walk, moving average, simple exponential, linear exponential… …   Investment dictionary

  • Data-flow analysis — is a technique for gathering information about the possible set of values calculated at various points in a computer program. A program s control flow graph (CFG) is used to determine those parts of a program to which a particular value assigned… …   Wikipedia

  • Data consistency — summarizes the validity, accuracy, usability and integrity of related data between applications and across an IT enterprise. This ensures that each user observes a consistent view of the data, including visible changes made by the user s own… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”