Dictionary Home » Dictionary Definitions » standard deviation

standard deviation

Statistics a measure of variability equal to the square root of the arithmetic average of the squares of the deviations from the mean in a frequency distribution

See standard deviation in American Heritage Dictionary 4

noun Abbr. SD
A statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.

Learn more about standard deviation

link/cite print suggestion box