Histogram from Scientific Research

Subspecies drumming number of hits. The plot shows histograms of the number of hits within drumming bouts. Number of hits represented a highly contributing variable in the pDFA, revealing that western chimpanzee (in brown) drum with more hits (median = 7; mode = 5) within drumming bouts than eastern chimpanzees (in blue; median = 4; mode = 3).

DOI