Comparison of billboard distribution for St Louis city and county
| Billboards | City | County | City:county density ratio | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Count | Density | Count | Density | ||||||||
| Non-tobacco | 497 | 8.03 | 500 | 0.98 | 8.19 | ||||||
| Tobacco | 145 | 2.34 | 97 | 0.19 | 12.32 | ||||||
χ2 = 7.91; df = 1, p < 0.01
Density is the number of billboards per square mile. St Louis city is 61.9 square miles, St Louis county is 507.7 square miles.