Biology, 02.10.2020 14:01, ghanim1963

An experiment is performed to determine if eating breakfast affects students' performance on exams. The experimental (independent) variable is
A. the students' scores on the exams.
B. the ages of the students.
C. whether or not the students eat breakfast.
D. whether or not the students drink coffee.

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An experiment is performed to determine if eating breakfast affects students' performance on exams....