Child population under 5 years old vs. Mean family size in Buffalo, New York

Figure 3. A bivariate map (proportional and choropleth map) displaying the (raw) child population under 5 years old and mean family size for census tracts in Buffalo, New York, U.S.A. For this map, symbol size was optimized, allowing the smallest symbols to be visible while minimizing excessive coalescence. White outlines were used to differentiate overlapping symbols. Psychological scaling was used.

Although I expected larger families to have more young children, no definitive trend occurs between child population and average family size. Census tracts with a large average family size had (both) large and small populations of young children.