Question

When either type of study is​ feasible, an experiment is usually preferred over an observational study. Explain why. Also explain why it is not always possible for researchers to carry out a study in an experimental framework.

Answer 1

An experiment is usually preferred over an observational study when feasible, but researchers sometimes cannot carry out a study in an experimental framework due to practical or ethical reasons.

Step-by-step explanation:

An experiment is usually preferred over an observational study when both types of studies are feasible in order to establish causation.

However, there are situations where it is not possible for researchers to carry out a study in an experimental framework.

For example, it may be impractical or unethical to manipulate variables in certain research questions. In these cases, observational studies are used to observe and measure naturally occurring phenomena without direct manipulation of the variables.

Observational studies are generally cheaper and easier to conduct and can provide a larger set of data than experimental studies.

Answer 2

An observational study is a study in which the investigator observes the effect of the factors, diagnosis, and treatment and other type interventions.

There are two types of observational studies:

• The cohort study
• The case-control study
• An experimental study in which intervention and research study has been introduced by the investigator. These studies are randomized and give meaning to the subject that is grouped by chance.

The observational studies are open to the dispute.