The Energy Policy Act of 2005 mandates that gasoline sold in the United States must average at least 2.78% ethanol in 2006. Does this mean that every gallon of gas sold has to include ethanol? The...

The Energy Policy Act of 2005 mandates that gasoline sold in the United States must average at least 2.78% ethanol in 2006. Does this mean that every gallon of gas sold has to include ethanol?

The Federal Reserve Survey of Consumer Finances reported that the median household net worth in the United States was $96,000 in 2009. In contrast, the mean household net worth was $481,000. How is it possible for the mean to be so much larger than the median?