In 2012 in the United States, most electricity was generated from coal (37%), natural gas (30%), or nuclear power plants (19%). Hydro-power accounted for 7% of the total electricity produced; other renewable sources such as wind or solar power accounted for 5%. Other non-renewable sources (such as petroleum)made up the remaining 2%.
a. Display this information in a bar graph.
b. Which is easier to sketch relatively accurately, a pie chart or a bar chart?
c. What is the advantage of using a graph to summarize the results instead of merely stating the percentages for each source?
d. What is the modal category?