For the data described in Problem 6.6 we wish to relate health data such as infant mortality

(the proportion of children dying before the age of one year) and life expectancy (the expected age at death of a person born today if the death rates remain unchanged) to other data such as gross national product per capita, percentage of people older than 15 who can read and write

(literacy), average daily caloric intake per capita, average energy consumption per year per capita, and number of persons per practicing physician. Suggest possible analyses. What other variables would you include in your analysis?