Box plots of the distribution of pScores as function of NormRate; + denotes outliers in the groups, the number of drugs in each group are noted at the top of the box. (A) The distribution of pScores varies little with NormRate. (B) Comparing the distribution of pScores for 1 ≤ NormRate < 1.25 and 1.5 ≤ NormRate using the two-tailed Mann–Whitney test; there is no difference between the two groups (P = 0.51).