Standard Deviation

**Semantic type:** Quantitative Concept

**Definition:** A measure of the range of values in a set of numbers. Standard deviation is a statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.

**Synonyms:** - RMSD - Root Mean Square Deviation - SD - SD - STANDARD DEVIATION - Std Dev - standard deviation