At the U.S. Census Bureau Web site, you can view the detailed data collected by the American Community Survey, though of course the identities of people and housing units are protected. If you choose the file of data on people, the individuals are the people living in the housing units contacted by the survey. Over 100 variables are recorded for each individual. Figure 1.1 displays a very small part of the data. Each row records data on one individual. Each column contains the values of one variable for all the individuals. Translated from the U.S. Census Bureau's abbreviations, the variables are