Research has shown that high school students' scores on the SAT correlate .40 with college freshman grades.Assuming that only half of the students who took the SAT were admitted to a given college, what would you estimate the correlation to be between their SAT scores and freshman grades?
A) Negative and lower than .40
B) Negative and higher than .40
C) Positive and higher than .40
D) Positive and lower than .40

Question

Quizplus · Accepted Answer

Restricting the sample to only those admitted (half of the students) typically reduces variability, which can lower the correlation, making it positive and lower than .40.

Research Has Shown That High School Students' Scores on the SAT