Statistics theory: Difference between revisions
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imported>Hendra I. Nurdin (general notion of a statistic) |
imported>Michael J. Formica m (Readability) |
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'''Statistics''' refers first to a branch of [[mathematics]] that specializes in enumeration [[data]] and their relation to measured [[data]]. It may also refer to a [[Fact of classification|fact of classification]], which is the chief source of all statistics. | '''Statistics''' refers first to a branch of [[mathematics]] that specializes in enumeration [[data]] and their relation to measured [[data]]. It may also refer to a [[Fact of classification|fact of classification]], which is the chief source of all statistics. | ||
In the singular, a statistic refers to a derived numerical value, such as a [[mean]], a [[coeffecient of correlation]], or some other single [[Descriptive statistics|descriptive]] concept. It may also refer to an idea of an average, such as a [[median]], or [[standard deviation]], or a value computed from a [[set]] of data. <ref>Guilford, J.P., Fruchter, B. (1978). ''Fundamental statistics in psychology and education''. New York: McGraw-Hill.</ref> More generally, a statistic can be any [[measurable function]] | In the singular, a statistic refers to a derived numerical value, such as a [[mean]], a [[coeffecient of correlation]], or some other single [[Descriptive statistics|descriptive]] concept. It may also refer to an idea of an average, such as a [[median]], or [[standard deviation]], or a value computed from a [[set]] of data. <ref>Guilford, J.P., Fruchter, B. (1978). ''Fundamental statistics in psychology and education''. New York: McGraw-Hill.</ref> | ||
More generally, a statistic can be any [[measurable function|measure]] within a data sample. This would be some quantification of a [[random variable]], or variables, of interest, such as a height, weight, polling results, test performance, and so on. | |||
==See also== | ==See also== | ||
Revision as of 10:57, 10 November 2007
Statistics refers first to a branch of mathematics that specializes in enumeration data and their relation to measured data. It may also refer to a fact of classification, which is the chief source of all statistics.
In the singular, a statistic refers to a derived numerical value, such as a mean, a coeffecient of correlation, or some other single descriptive concept. It may also refer to an idea of an average, such as a median, or standard deviation, or a value computed from a set of data. [1]
More generally, a statistic can be any measure within a data sample. This would be some quantification of a random variable, or variables, of interest, such as a height, weight, polling results, test performance, and so on.
See also
- Coefficient of correlation
- Data
- Descriptive statististics
- Mathematics
- Mean
- Median
- Mode
- Psychometrics
- Set
- Standard deviation
References
- ↑ Guilford, J.P., Fruchter, B. (1978). Fundamental statistics in psychology and education. New York: McGraw-Hill.