An epidemiologist presented information regarding the annual prevalence (number of cases per 1,000) of adolescent pregnancy to a local health planning board. The epidemiologist compared prevalence rates for the local county with prevalence rates for the United States as a whole. One of the members of the planning board objected that this comparison was not valid because the county is much smaller than the entire country, thus the numbers should not be compared. Do you agree with the objection? Why or why not?