A student wants to test the effect of different amounts of caffeine on the heart rate of dogs. Describe the experimental groups in this experiment. What is the dependent variable? type of dogs amount of caffeine the heart rate number of dogs

Experimental groups: type of dogs

Dependent variable: hearth rate

Independent variable: the amount of caffeine  

Explanation:

The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.