Determine whether the study depicts and observational study

Determine whether the study depicts and observational study or an experiment. A study is conducted to determine if there is a relationship between heart arrhythmias and caffeine consumption. A sample of 100 people with heart arrhythmia are asked about their caffeine consumption. Does the description correspond to an observational study or an experiment?

Solution

Ans:

Correct option is observational study.

The study is an observational study,because the study examines individual in a sample,but does not try to influence the response variable.