Math.mean exposes the following methods:
arithmetic(numbers, weights = null)geometric(numbers, weights = null)harmonic(numbers, weights = null)quadratic(numbers, weights = null)power(numbers, weights = null, power)root(numbers, weights = null, degree = 2)logarithmic(numbers, weights = null, base = Math.E)contraharmonic(numbers, weights = null)Lehmer(numbers, weights = null, p = 2)