Definition:Deviation from Mean

Definition

Let $S$ be a set of observations of a random variable $X$.

Let $x \in S$.

The deviation of $x$ from the mean is the difference between $x$ and the arithmetic mean $\bar x$ of $S$:

$x - \bar x$

Sources

• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): deviation