At john jay junior high school, 75 percent of the students buy lunch in the cafeteria every day. a sample of 60 students completed a survey about the lunches offered in the cafeteria every day. of the students who completed the survey, 35 buy lunch in the cafeteria every day. is the sample representative of the students at the high school with reference to the number of students who buy lunch in the cafeteria every day? explain your answer.