Xr12-149* Unfortunately, it is not uncommon for high school students in the United States to carry weapons (guns, knives, or clubs). To determine how prevalent this practice is, a survey of high school students was undertaken. Students were asked whether they carried a weapon at least once in the previous 30 days (1  no, 2  yes anywhere on school property), and genders (1  male, 2 

female). Estimate with 95% confidence the proportion of all high school students who have carried weapons in the last 30 days. (Adapted from Statistical Abstract of the United States, 2009, Table 239.)