Class size freshman 2200 sophomore 1800 junior 1400 senior 1100 heidi is doing a study for her statistics class, and she needs to obtain a random sample of students from a local college. [the enrollment at the college is summarized in the table shown.] choose the best way to obtain a sample of size 50. a) select 50 students from a new student orientation session. b) select 50 students from participants in a career day presentation. c) select 50 students from the stadium homestands during a football game. d) select only seniors because they have been attending the school longer. which is the answer