To reduce energy consumption, many governments around the world have considered legislation to phase out incandescent light bulbs. The goal is to move toward compact fluorescent bulbs and other more efficient sources of lighting. Can this really make much difference? The California Energy Com-mission reported the following summary of house-hold electricity use. Based on this chart, can more efficient lighting have much impact on household energy use?
Answer to relevant QuestionsThis plot shows the holdings, in billions of dollars, of U.S. Treasury bonds in five Asian countries. Is this a bar chart in the sense of this chapter or a chart of a table of five numbers that uses bars? A categorical variable denotes the state of residence for customers to a Web site. Would you prefer to see a bar chart, a pie chart, or a frequency table? Would it be useful to combine some of the categories? Why? These data summarize the market share for artificial sweeteners held by the major brands in 2002 and 2005. Prepare a chart that shows the shares each year and the brands that gained the most share from 2002 to 2005. Each row of data indicates the make of vehicles sold at auction in the US in 2010. The data table describes 1,884 vehicles. (a) Using software, tabulate the frequencies of the makes of cars. (b) What is the mode of the make ...What happens to the range as the number of observations increases? If you have a data table that shows the balance of 100 loans, does the range get smaller, get larger, or stay the same if the number of loans is increased to ...
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