A college professor reports that students who finish exams early tend to get better grades than students who hold on to exams until the last possible moment. The correlation between exam score and amount of time spent on the exam is an example of a ____.
a. positive correlation
b. negative correlation
c. correlation near zero
d. correlation near one
Question 2
A(n) _______________ effect occurs when differences on one factor depend on the level of another factor.
Fill in the blank(s) with correct word
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Students working around a computer