measure of central tendency quadratic mean Alejandra Gonzalez-Beltran Orlaith Burke Philippe Rocca-Serra RMS The root mean square (abbreviated RMS or rms), also known as the quadratic mean, in statistics is a statistical measure of central tendency defined as the square root of the mean of the squares of a sample. ( To find the root mean square of a set of numbers, square all the numbers in the set and then find the arithmetic mean of the squares. Take the square root of the result. This is the root mean square.) https://en.wikipedia.org/wiki/Root_mean_square and http://www.mathwords.com/r/root_mean_square.htm last accessed: 2015-11-04 root mean square ready for release