If the states with lower IQs have a higher percentage of African Americans than the other states, they will have a higher rate of infectious diseases due to the propensity of infectious diseases among that group with respect to others.
PS: The two states with the lowest rate of infectious diseases, Nevada and West Virginia are respectivelly the 2nd and 7th lowest IQ states. #1 lowest IQ, Hawaii was deemed an outlier because of latitude and excluded from the results of the study you linked to.
If the states with lower IQs have a higher percentage of African Americans than the other states, they will have a higher rate of infectious diseases due to the propensity of infectious diseases among that group with respect to others.
PS: The two states with the lowest rate of infectious diseases, Nevada and West Virginia are respectivelly the 2nd and 7th lowest IQ states. #1 lowest IQ, Hawaii was deemed an outlier because of latitude and excluded from the results of the study you linked to.
http://www.americashealthrankings.org/explore/2016-annual-re...