in the sample distribution and will croak otherwise. D'Agostino K-Squared Test The D'Agostino K-Squared test is a good test against non-normality arising from kurtosis and/or skewness [Dagostino90]. $pval = dagostino_k_square_test ([0.34, -0.2, ...]); ($pval, $ksq_statistic) = dagostino_k_square_test ([0.34, -0.2, ...]); The test statistic depends upon both the sample kurtosis and skewness,