Suppose You Want to Estimate the Average Number of Courses

Suppose you want to estimate the average number of courses that students at your school take in the natural sciences. The registrar provides a complete list of student names, along with each student's campus or local address, class year, and major. Assuming that you can only select 100 students, your best estimate would probably come from a

A) simple random sample.
B) systematic sample.
C) stratified random sample, stratifying on student major.
D) cluster sample, with student residence halls serving as the clusters.
E) quota sample, with twenty-five students selected from each class.

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