The 200 students in Years 11 and 12 at a high school were asked whether or not they had ever smoked a cigarette. The replies received were:
- nnnny nnnyn ynnnn yynyy ynyny ynnyn nyynn yynyn ynynn nyynn
ynnyn yynyy nnyyy yyyyy nnyy nnnnn nnyny yynny nnnyy yynyn
nynnn ynyyn nnyy yynyy ynnnn yyyyn yynn nynyn yynny yynny
nynnn ynyy nyynn yynyn ynynn nyyn ynyy nyyn ynyy nnyy ynnn