A scientist wants to determine if people who live in places

A scientist wants to determine if people who live in places of high air pollution get more colds than people in areas with little air pollution. Do you think it is possible to design an experimental study to answer this question, or will it be an observational study? Explain.

Solution

A scientist wants to determine if people who live in places of high air pollution get more colds than people in areas with little air pollution.Here we use obseravational study

Observational Study

Like experiments, observational studies attempt to understand cause-and-effect relationships. However, unlike experiments, the researcher is not able to control (1) how subjects are assigned to groups and/or (2) which treatments each group receives.

For example, a sample survey, does not apply a treatment to survey respondents. The researcher only observes survey responses. Therefore, a sample survey is an example of an observational study