Education researchers are interested in the workload expectations of freshmen at a local university. Which of the following techniques would give a stratified random sample? a. Randomly select 10 freshmen from each of the majors at the university.
b. Randomly select 10 freshmen from the cafeteria on each of the 5 days of the first school week.
c. Randomly select 1 professor at the university and have them survey all of their freshman students.
d. Survey the students in some randomly selected freshman seminar classes, since freshmen are randomly put into those classes.