The Energy Information Administration reported the following sources of electricity in the United States in 2013:

Source of Electricity Percentage

Coal 39%

Hydro and renewables 13%

Natural gas 27%

Nuclear power 19%

Other 2%

Source: Energy Information Administration, 2014.

a. Construct a Pareto chart.

b. What percentage of power is derived from coal, nuclear power, or natural gas?

c. Construct a pie chart.

d. For these data, do you prefer using a Pareto chart or a pie chart? Why?