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/** * 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. * * @since 3.0.0 * @param {number} mean1 mean of the first list * @param {number} n1 number of items in the first list * @param {number} mean2 mean of the second list * @param {number} n2 number of items in the second list * @returns {number} the combined mean * * @example * combineMeans(5, 3, 4, 3); // => 4.5 */function combineMeans(mean1, n1, mean2, n2) {    return (mean1 * n1 + mean2 * n2) / (n1 + n2);}
export default combineMeans;