On Fri, 18 Oct 2019, Mehdi Dadkhah wrote:
I am using Interpretive structural modeling (ISM) ...
My question is: How should I calculate geometric mean of experts’ opinions ...
I'm not a statistician, nor do I know anything about ISM. With that disclosure I offer a couple of thoughts. First, the calculation of a geometric mean involves multiplying the 'n' data points and taking the 'nth' root of the product. Second, expert (and others') opinions are along a continuum of a set, perhaps ranging from 'Completely False' to 'Completely True'. I addressed the need to quantify this subjectivity in environmental impact assessments by using fuzzy sets and fuzzy logic in applying Thomas Saaty's 'Analytical Hierarchy Process.' Perhaps these thoughts are usfull for you. Regards, Rich ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
