Multiple Choice
A researcher investigated the relationship between length of test and grades in a western civilization course. After randomly assigning students to groups, she found that students who took longer exams received better grades than students who took shorter exams. In this scenario, the independent variable is:
A) test grades.
B) gender of the students.
C) class size.
D) length of test.
Correct Answer:
Verified
Correct Answer:
Verified
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