Main Page | See live article | Alphabetical index In probability theory and statistics, the kth standardized moment of a probability distribution is μk/σk, where μk is the kth moment about the mean and σ is the standard deviation. The third and fourth standardized moments are used to define skewness and kurtosis. For more information on "moments", please consult Wolfram Research's [mathworld website]. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.