a doctor has patients run on a treadmill for 0,10, and 20 minutes and then measures their self reported mood.
the independent variable is:
A. the self reported mood
B. running for 0,10,20 minutes
C. somatic
D. not known based on given info
(i think its B but not sure) plz helpWhat is the independent variable in this study?
It's B. The independent variable is the factor that the doctor controls. The dependent variable would be the reported mood, the outcome of the experiment.
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