All significant correlations presented in Sect. 8.3. Above each figure, you can find the Spearman, Kendall and Pearson probabilities of each of the correlations. Please keep in mind that Pearson can only be used for linear relationships, while Spearman and Kendall are both rank-test and thus can be used for any relation between two parameters. The correlations in b) − d) are clearly significant, while the correlations in a) is only tentative.