An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rate of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the amount of soda age of participants type of soda pulse rate

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