Fig. 3
From: Non-randomness of the anatomical distribution of tumors
Plot of Q vs the product NP of the number N of trials and the probability P. Note that Q ~ NP for NP < < 1 and Q ~ 1 for NP > > 1. The crossover occurs for NP ~1. Note that the number N of circles filling the region is proportional to the area A of the region. For this plot we used P = 1%