Life expectancy for all the different countries in the world ranges from a low of only 43.9 years (in Afghanistan) to a high of 82.8 years (in San Marino). Life expectancies are clustered at the high end, with about half of all the countries having a life expectancy between about 72 and the maximum of 82.8. A few countries, such as Afghanistan, have a very low life expectancy. The full dataset is in AllCountries.

(a) What is the shape of the distribution of life expectancies for all countries?

(b) From the information given, estimate the median of the life expectancies.

(c) Will the mean be larger or smaller than the median?