 D'Agostino's K-squared test is a goodness-of-fit normality test based on a combination of the sample skewness and sample kurtosis, as is the Jarque–Bera test for normality.For non-normal samples, the variance of the sample variance depends on the kurtosis; for details, please see variance.Pearson's definition of kurtosis is used as an indicator of intermittency in turbulence.