Statistic
Statistic
Statistic (pronunciation: /stəˈtɪstɪk/) is a term derived from the Latin word 'statisticum collegium' and the Italian word 'statista', meaning 'state affairs'. It refers to a single measure of some attribute of a sample (e.g., its arithmetic mean value). It is calculated by applying a function (statistical algorithm) to the values of the items of the sample, which are known together as a set of data.
More generally, a statistic is an observable random variable that depends on a sample of a population, not the entire population. A statistic is an estimate of an unknown parameter. The parameter itself is a fixed but unknown value, and the statistic is a function of the data that is defined in such a way that it estimates the parameter.
Related Terms
- Sample (statistics): A subset of a statistical population that accurately reflects the members of the entire population.
- Population (statistics): A complete set of items that share at least one property in common that is the subject of a statistical analysis.
- Parameter (statistics): A quantity describing a statistical population.
- Variable (statistics): An attribute that describes a person, place, thing, or idea.
- Data (statistics): Facts, figures, and other evidence gathered through observations.
- Algorithm (statistics): A set of rules to be followed in calculations or other problem-solving operations.
See Also
- Descriptive Statistics
- Inferential Statistics
- Statistical Analysis
- Statistical Theory
- Statistical Methods
References
- Statistics: A Guide to the Unknown
- The Art of Statistics
- Statistics: The Art and Science of Learning from Data
External links
- Medical encyclopedia article on Statistic
- Wikipedia's article - Statistic
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