Which of the following statements represents one of the differences between an experiment and an observational study?

Inclusion of random sample.

Introducing a change to the subgroup.

Ability to calculate the mean.

Ability to draw conclusions.

Introducing a change to the subgroup

Step-by-step explanation:

Given there are four statements. We have to find the one which represents one of the differences between an experiment and an observational study.

The answer is option 2. Introducing a change to the subgroup

Experimental and observational studies are both types of studies between which a number of differences can be identified. When conducting research studies, various types of research in order to arrive are adopted according to the need.

An experimental study is a study where the researcher has control over most of the variables.

On the other hand, an observation study is a study where the researcher cannot control any variable but merely observes the subject without controlling any variables.