import { combineMeans } from "https://deno.land/x/simplestatistics@v7.7.5/index.js";
When combining two lists of values for which one already knows the means, one does not have to necessary recompute the mean of the combined lists in linear time. They can instead use this function to compute the combined mean by providing the mean & number of values of the first list and the mean & number of values of the second list.