An average of n numbers computed by adding some function of the numbers and dividing by some function of n .
In mathematics, a measure of the average of a number of terms or quantities. The simple arithmetic mean is the average value of the quantities, that is, the sum of the quantities divided by their number. The weighted mean takes into account the frequency of the terms that are summed; it is calculated by multiplying each term by the number of times it occurs, summing the results and dividing this total by the total number of occurrences. The geometric mean of n quantities is the nth root of their product. In statistics, it is a measure of central tendency of a set of data. + prikaži više

(RMS) In mathematics, value obtained by taking the square root of the mean of the squares of a set of values; for example the rms value of four quantities a, b, c, and d is Ö[(a2 + b2 + c2 + d2)/4].
For an alternating current (AC), the rms value is equal to the peak value divided by the square root of 2.