In probability theory and statistics, the

*k*th

**standardized moment**of a probability distribution is μ

_{k}/σ

^{k}, where μ

_{k}is the

*k*th 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].