Definition:Sample Mean

Definition

Let $S = \set {x_1, x_2, \ldots, x_n}$ be a random sample from a population.

The sample mean of $S$ is defined and denoted as:

$\overline x = \ds \sum \dfrac {x_i} n$

Also see

• Results about sample means can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): random sample: 2.
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): random sample: 2.