Figure 2: Boxplots showing light transmissions of potencies and controls (measurements 1 to 5) of CuSO4 (a), hypericum (b), S8 (c). Circles represent outliers (that lie more than one and a half box lengths above or below from the upper or lower quartile, resp.). Every potency level was compared to the combined controls using a Mann-Whitney-U test. Statistically significant results are marked by *. Due to multiple testing, was corrected according to Bonferroni (* ).