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Definition: Statistic

statistic is a single measure of some attribute of a sample. It is calculated by applying a statistical algorithm to the data set.

statistic can also be defined as a function of a sample where the function in itself is independent of the sample's distribution. The term statistic can be used for the function and value of the function on a given sample.

A statistic, when used to estimate a population parameter, is sometimes called an estimator. For instance, the sample mean is a statistic that is used to estimate the population mean, which is again a parameter.

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