Arithmetic Mean

mctad.arithmeticMean() accepts an Array of Numbers and returns their average as a Number. It is aliased by mctad.mean(). More at the Wikipedia article.

mctad.arithmeticMean = function (data) {

The arithmetic mean is undefined if the data is not in an Array of 1 or more elements.

if (!Array.isArray(data) || data.length === 0) { return undefined; } return this.sum(data)/data.length; };