# Definition:Sample Statistic

## Definition

A **sample statistic** is a numerical description of a sample.

## Also known as

A **sample statistic** can also be seen referred to as just a **statistic** when it is not necessary to emphasize the distinction between a **sample statistic** and a population parameter.

Another word for **sample statistic** is **datum**.

Also note the plural form **statistics** (as used in this context), also known as **data**.

The word **data** is more commonly encountered than **statistics**, as the latter word is also used to mean the mathematical discipline as opposed to these particular elements.

### Discrete Data

Data which can be described with a discrete variable are known as **discrete data**.

### Continuous Data

Data which can be described with a continuous variable are known as **continuous data**.

### Raw Data

**Raw data** are collected data which have not been organized or analysed in any way.

## Linguistic Note on Data

The word **data** is a plural noun.

Its singular is **datum**, which derives from the Latin for **thing which is (or has been) given**.

Like many other nouns whose plural form is irregular, in popular usage **data** is often (technically incorrectly) used as both the singular and plural forms.

## Sources

- 1972: Murray R. Spiegel and R.W. Boxer:
*Theory and Problems of Statistics*(SI ed.) ... (previous) ... (next): Chapter $1$: Variables and Graphs: Statistics - 1998: David Nelson:
*The Penguin Dictionary of Mathematics*(2nd ed.) ... (previous) ... (next):**data**(*singular***datum**) - 1998: David Nelson:
*The Penguin Dictionary of Mathematics*(2nd ed.) ... (previous) ... (next):**statistics**:**3.** - 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next):**data**(*singular***datum**) - 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next):**statistics**:**3.** - 2011: Charles Henry Brase and Corrinne Pellillo Brase:
*Understandable Statistics*(10th ed.): $\S 1.1$ - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next):**data**