Quick Question
Use the tapply function to find the average child mortality rate of countries in each region.
Which region has the lowest average child mortality rate across all countries in that region?
Explanation
You can find the average child mortaility rate of countries in each region by using the following command:
tapply(WHO$ChildMortality, WHO$Region, mean)
The output tells us that Europe has the lowest average child mortality rate across all countries, with an average of 10.05.