The Dean of Students mailed a survey to a total of 400 students. The sample included 100 students randomly selected from each of the freshman, sophomore, junior, and senior classes on campus last term. What sampling method was used?
A) simple random sample B) systematic sample
C) stratified sample D) cluster sample
Question 2
The evening host of a dinner dance reached into a bowl, mixed all the tickets around, and selected the ticket to award the grand door prize. What sampling method was used?
A) simple random sample B) systematic sample
C) stratified sample D) cluster sample
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