weighted mean

https://doi.org/10.1351/goldbook.W06670
If in a series of observations a @D01556@ (\(w_{i}\)) is assigned to each value, a weighted mean \(\overline{x}_{w}\) can be calculated by the formula: \[\overline{x}_{w}=\frac{\sum w_{i}\ x_{i}}{\sum w_{i}}\]
Source:
PAC, 1994, 66, 595. (Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)) on page 599 [Terms] [Paper]