## arithmetic mean (average)

https://doi.org/10.1351/goldbook.A00440
The sum of a series of observations divided by the number of observations. Symbol: $$\bar{x}$$. It can be calculated by the formula: $\bar{x}=\frac{\sum x_{i}}{n}$
Note:
All summations are taken from 1 to $$n$$. Note that the arithmetic mean is an unbiased estimate of the population mean, i.e. $$\mu$$ is the limiting value for $$\bar{x}$$, as $$n\rightarrow \infty$$.
Source:
PAC, 1994, 66, 595. (Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)) on page 599 [Terms] [Paper]