Xr12-41 On a per capita basis, the United States spends far more on health care than any other country.

To help assess the costs, annual surveys are undertaken. One such survey asks a sample of Americans to report the number of times they visited a health-care professional in the year. The data for 2006 were recorded. In 2006, the United States population was 299,157,000. Estimate with 95%

confidence the total number of visits to a health-care professional. (Adapted from the Statistical Abstract of the United States, 2009, Table 158.)