The average difference between men and womenon all traits included in the studyfell into the small category, illustrated by the bell curve in Figure 3.1. The graph represents levels of self-esteem (from low on the left to high on the right) and the height of the curve represents the number of people who reported each level. Few people have very low self-esteem (far left) or very high self-esteem (far right). While Zell and his colleagues' analysis offered good evidence for a statistically significant difference between men and women, it's not a large one