Xr12-153 In 2007, there were 116,011,000 households in the United States. There were 78,425,000 family households made up of married-couple, single-male, and single-female households. To determine how many of each type, a survey was undertaken. The results were stored using the codes 1  married couple, 2  single male, and 3 

single female. Estimate with 95% confidence the total number of American households with married couples. (Adapted from Statistical Abstract of the United States, 2009, Table 58.)