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A Professor Presents a Test in Black Ink for Half

Question 118

Multiple Choice

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the dependent variable in this experiment?​


A) The number of students in each group
B) ​The color of ink on the test
C) ​The students' test scores
D) ​The difficulty of the test

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