If we were to ask college students, "To what extent do you value a college degree?", which type of sample plan would be most appropriate?
A) Any probability sampling plan would be useful.
B) a stratified sample because we would expect the answers to vary by strata: freshmen, sophomore, junior, and senior
C) a cluster sample because we would expect the answers to vary by cluster: freshmen, sophomore, junior, and senior
D) an area sample because we would expect the answers to vary by area: freshmen, sophomore, junior, and senior
E) an area sample because we would expect the answers to vary by area: freshmen, sophomore, junior, and senior, with seniors more heavily sampled
Answer: B) a stratified sample because we would expect the answers to vary by strata: freshmen, sophomore, junior, and senior