Question

determine whether the description corresponds to an observational study or an experiment. research is conducted to determine if there is a relation between heart arrhythmias and caffeine consumption. does the description correspond to an observational study or an experiment? experiment observational study

Explanation:

In an observational study, researchers observe and measure characteristics without manipulating variables. Here, they are just looking for a relation between heart arrhythmias and caffeine consumption without controlling or manipulating caffeine intake. In an experiment, the researcher would manipulate the independent variable (caffeine consumption) and observe the effect on the dependent variable (heart arrhythmias). Since no manipulation is mentioned, it's an observational study.

Answer:

Observational study