Another way to think about life expectancy is to say that it is partially a result of the choices we make, and the quality of choices might be indicated by our extent of education. Here we have represented education by the percent of a tract’s population over 25 that has a bachelor’s degree or higher. One could argue, appropriately, that getting a college education is at least partially a function of family income, but for now we want to see the simple correlation of this measure or education and life expectancy. We find a correlation between life expectancy and those with a bachelor’s degree or higher is 0.721 (sig. 0.00), meaning, as an individual’s education level increases so does their average age of life expectancy. In Detroit, the map below shows that majority of the Census Tracts that make up the City have about 8 percent of the 25 years of age and older population having earned a bachelor’s degree or higher. And, as we’ve discussed throughout this series, Detroit has among the lowest average life expectancy rates in the Southeastern Michigan region. The two Census Tracts in Detroit with the highest life expectancy rates (86-90 years of age) also have the highest percentage of individuals age 25 years and older with a bachelor’s degree or higher. The one Census Tract just south of 8 Mile Road with the highest average life expectancy rate has between 15 and 25 percent of the 25 years of age and older population having earned a bachelor’s degree or higher. The other Census Tract in Detroit with the highest average life expectancy is just southwest of Downtown Detroit and has between 25 and 48 percent of the 25 and older population having earned a bachelor’s degree or higher. On the opposite side of the spectrum, three of the four Census Tracts in the Detroit with the lowest average life expectancy (62-65) also have the lowest percentage of residents 25 years of age and older who earned a bachelor’s degree or higher.

Outside of Detroit there are similar trends: communities with lower average life expectancies tend to also have lower percentages of individuals with a bachelor’s degree or higher. For example, the majority of Washtenaw County has an average life expectancy at 86 years of age or older. Additionally, the majority of that county has 15 percent or more of the 25 years of age and older population having earned a bachelor’s degree or higher. There are exceptions, areas in the more rural counties, particularly Monroe and St. Clair counties, though that have average life expectancies above the regional average but have lower percentages of individuals living with a bachelor’s degree or higher.

As has been shown above, there is a strong positive correlation between the percentage of individuals 25 years of age and older who earned a bachelor’s degree or higher and an individual’s life expectancy. This positive correlation is further demonstrated in the scattergram below, which shows that as the percentage of the population with a bachelor’s degree or higher increases, so does the average life expectancy. The chart also shows that majority of the population in Southeastern Michigan has a life expectancy between 70 and 80 years of age with 20 percent or less of that population having earned a bachelor’s degree or higher. Additionally, the chart shows that any area with a population that has 60 percent or more of the population having earned a bachelor’s degree or higher has an average life expectancy of 75 years of age or higher.

As has been shown through some of the examples above, there is a strong positive correlation between the percentage of individuals 25 years of age and older who earned a bachelor’s degree or higher and an individual’s life expectancy. This positive correlation is further demonstrated in the chart above, which shows that as the percentage of the population with a bachelor’s degree or higher increases, so does the average life expectancy. Additionally, the chart shows that any area with a population that has 60 percent or more of the population having earned a bachelor’s degree or higher has an average life expectancy of 75 years of age or higher.

Overall, these maps and the graph show that education is related to an individual’s life expectancy. Reasons for this include, tendency to earn higher wages, which allows easier access to health care and transportation. In a recent News Scientist article it was also stated that more education leads to higher life expectancy because education improves an individual’s cognitive abilities, which allows for better planning and self-control.

Next week, we will further examine how all three factors, education, access to health insurance and poverty, all affect an individual’s life expectancy.