Application of the Kolmogorov-Smirnov test to CMB data: Is the universe really weakly random?

Abstract

A recent application of the Kolmogorov-Smirnov test to the WMAP 7 year W-band maps claims evidence that the CMB is "weakly random", and that only 20% of the signal can be explained as a random Gaussian field. I here repeat this analysis, and in contrast to the original result find no evidence for deviation from the standard {\Lambda}CDM model. Instead, the results of the original analysis are consistent with not properly taking into account the correlations of the {\Lambda}CDM power spectrum.