weighted mean 

https://doi.org/10.1351/goldbook.W06670
If in a series of observations a statistical weight (wi) is assigned to each value, a weighted mean x―w can be calculated by the formula: x―w=∑wi xi∑wi
Source:
PAC, 1994, 66, 595. (Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)) on page 599 [Terms] [Paper]
Citation: 'weighted mean' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.W06670 RIS BibTex EndNote
Div. VPDFTextXMLJSON
Last revised: February 24, 2014