Unimodal distribution

Unimodal is a statement about shape rather than center: it says the values cluster around one location instead of two or more. You judge it from a graph by counting the major peaks and ignoring small bumps that come from random wobble in the counts. For example, a dotplot of resting heart rates for 60 adults might pile up near 70 beats per minute and thin out in both directions, which you would call unimodal. A graph with two distinct peaks is bimodal instead, and one with no peak at all is roughly uniform.