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What is the difference between a parameter and a statistic?

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Quick Answer

A statistic describes a sample, while a parameter describes an entire population. A sample is a smaller subset that is representative of a larger population.

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What is the difference between a parameter and a statistic?
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Full Answer

The symbols differ when reporting statistics versus parameters. The average symbol for a statistic is an x with a line on top of it. For a parameter, the average is represented by the symbol μ. Since it is not always possible to collect every single observation in a population, sampling procedures are used to select a representative sample. Random sampling allows a statistician to calculate statistics about a sample and apply them to a population.

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