Figure 3. Pearson’s Correlation Coefficient analysis between total COVID-19 cases and population density per square km in April 2020 in 50 of the largest cities in each state. Outlier data point represents the number of COVID-19 cases in New York City (r=0.792, P<.01)

From

The Effect of Temperature, Dewpoint, and Population Density on COVID-19 Transmission in the United States: A Comparative Study

Virginia C. Hughes

American Journal of Public Health Research. 2020, 8(4), 112-117 doi:10.12691/ajphr-8-4-2