Infant mortality rates are a key indicator of the quality of health care a country can provide for its citizens. The following table shows infant mortality rates for selected countries based on estimates reported by the Central Intelligence Agency World Factbook 2010.

a. Calculate the mean and median infant mortalities reported for the 11 countries presented above.
b. Is this distribution skewed? If yes, how do you know?
c. Provide two possible explanations that might explain why countries have very low infant mortality rates while others have very high infant mortality rates.