re: It's hard for me...

According to the latest census, only 78% of Tuscaloser residents over the age of 25 claimed to have a high school diploma and only 30% of those same people claimed to have a college degree. 91% of the residents in Auburn over the age of 25 claimed to have a high school diploma and 56% of those people claimed to have a college degree. What does the population of those respective cities have to do with those stats?