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A professor increases the temperature in her classroom to see its effect on her students' attention span. What is the Independent Variable in this experiment?

A professor increases the temperature in her classroom to see its effect on her students' attention span. What is the Independent Variable in this experiment? A professor increases the temperature in her classroom to see its effect on her students' attention span. What is the Independent Variable in this experiment? the researcher the student's attention span classroom temperature the students

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