Many universities and colleges have instituted supplemental instruction (si) programs, in which a student facilitator meets regularly with a small group of students enrolled in the course to promote discussion of course material and enhance subject mastery. suppose that students in a large statistics course (what else? ) are randomly divided into a control group that will not participate in si and a treatment group that will participate. at the end of the term, each student's total score in the course determined.
a. are the scores fiom the si group a sample from existing population? if so, what is it? lf not, what is the relevant conceptual population?