Descriptive Statistics for the TCGA GBM Distribution.

Note that both the mean and median are approximately equal to zero and the standard deviation is approximately equal to 1. Measurements of skew and kurtosis deviate from those expected for a Gaussian distribution, and test statistics indicate that these deviations are statistically significant (test statistic >2 approximately corresponds to p<0.05, see text). These results are depicted graphically in Figure 7.