In 2010, there were 117,538,000 house-holds in the United States. There were 78,833,000 family households made up of married couples, 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.