For 1, 2 and 3

A researcher is interested in the academic performance of student-athletes and estimates the following regression where trmgpa is the student’s gpa (on a 4.0 scale) in the sampled term, math is the math SAT score, sat is the total SAT score (i.e. math + verbal), frstsem is a dummy variable =1 if the sampled term is the student’s first ... ................
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