Scientists are conducting an experiment to test a hypothesis that a drug called, Spauldingo, increases knowledge of biology. One hundred students are given the
Spauldingo pill; another 100 students are given a similar-looking sugar pill. The students
are then given a biology exam and their exam scores are compiled as data. What is the
dependent variable in this experiment?
O The presence or absence of Spauldingo in the pill
The different abilities of the students
O The exam scores
The sugar pill
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