The potential range of r-values of the D (red) and F (blue) samples accounting for uncertainty (left panel). Corresponding p-values from traditional statistical methods assuming a Gaussian distribution are also shown (right panel). Distributions are estimated from Pearson’s r correlations of neutron monitor counts during resamples of the D and F composites, wherein values within the ±1 SEM range were considered equally likely to occur. The r- and p-values from the means of the D and F samples (solid black lines of Fig. 4) are indicated by markers.