123456789101112131415161718192021222324252627282930313233343536373839
/* eslint no-shadow: 0 */
const test = require("tap").test;const ss = require("../dist/simple-statistics.js");
test("combineVariances", function (t) {    t.test("can combine the variances of two lists", function (t) {        const values1 = [8, 3, 4];        const values2 = [2, 6, 4];
        t.equal(            +ss                .combineVariances(                    ss.variance(values1),                    ss.mean(values1),                    values1.length,                    ss.variance(values2),                    ss.mean(values2),                    values2.length                )                .toPrecision(3),            3.92        );        t.equal(            ss.combineVariances(                ss.variance(values1),                ss.mean(values1),                values1.length,                ss.variance(values2),                ss.mean(values2),                values2.length            ),            ss.variance(values1.concat(values2))        );        t.end();    });    t.end();});