Statistics theory
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 coefficient 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 precisely and generally, in mathematical statistics, a statistic is defined as any measurable function of the data sample[2]. A data sample is regarded as instances of a random variable of interest such as a height, weight, polling results, test performance, and so on, obtained by random sampling of a population.
See also
- Coefficient of correlation
- Data
- Descriptive statististics
- Mathematics
- Mean
- Median
- Mode
- Psychometrics
- Set
- Standard deviation