The Percentage of Residential Electricity Consumption in the United States

2.28 The following table indicates the percentage of residential electricity consumption in the United States, organized by type of appliance in a recent year:
Type of Appliance Percentage (%) Air conditioning 18 Clothes dryers 5 Clothes washers/other 24 Computers 1 Cooking 2 Dishwashers 2 Freezers 2 Lighting 16 Refrigeration 9 Space heating 7 Water heating 8 TVs and set top boxes 6 Source: Data extracted from J. Mouawad, and K. Galbraith, “Plugged-in Age Feeds a Hunger for Electricity,” The New York Times, September 20, 2009, pp. 1, 28
a. Construct a bar chart, a pie chart, and a Pareto chart. b. Which graphical method do you think is best for portraying these data? c. What conclusions can you reach concerning residential electricity consumption in the United States?