Approved Sites The principals at 5 middle schools asked their teachers if they preferred a shorter work day or a shorter school year. Afterward, Mr. Howard asked the same question of some of the teachers at his school. • Of the 500 teachers in the principals' survey, 220 said they preferred the shorter work day. • Of the 10 teachers in Mr. Howard's survey, 4 said they preferred the shorter school year. Which statement best explains why Mr. Howard's results are different from the principals results?