Discuss the differences by age between the two cities and hypothesis as to what those differences might mean in terms of crude death rates. Then, using the CDR, create a standardized mortality rate to compensate for the age differences between the two cities.

\begin{tabular}{|l|r|r|} \hline Crude Death Rate & A city (per 100,000 Population) & B City (per 100,000 Population) \\ \hline Under 5 & 119 & 23.7 \\ \hline Under 18 & 21.3 & 11.7 \\ \hline 65 years and over & 3772.8 & 647.74 \\ \hline Female persons & 618.7 & 501.84 \\ \hline \end{tabular}