Saturday, February 4, 2012

What is the independent variable in this study?

Men with symptons of impotence received either viagra or a placebo. is the independent variable men, placebo,viagra, or symptoms of impotence?What is the independent variable in this study?
It's the type of medicine they received.



(Independent variable is the thing the experimenter changes to see what will happen. Dependent variable is what happens.)

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