Finds the min/max range for where outliers would fall, given an array of unsorted numbers.

find-outliers.js

'use strict';

module.exports = findOutliers;

/**
 * Finds the min/max ranges for outliers, given an array of unsorted numbers.
 * @param   {Array}  data
 * @returns {Object}
 */
function findOutliers(data) {
    var sorted = data.sort(function (a, b) {
        return a - b;
    });

    var median = sorted[Math.floor(sorted.length * 0.5)];
    var q1 = sorted[Math.floor(sorted.length * 0.25)];
    var q3 = sorted[Math.floor(sorted.length * 0.75)];
    var iqr15 = (q3 - q1) * 1.5;

    return {
        min: q1 - iqr15,
        max: q3 + iqr15
    };
}