The answer is "An experiment."
An experiment refers to a controlled study in which the scientist endeavors to comprehend circumstances and end results connections. The examination is "controlled" as in the analyst controls (1) how subjects are relegated to gatherings and (2) which medicines each gathering gets.
In the analysis stage, the specialist thinks about gathering scores on some reliant variable. In view of the investigation, the scientist makes an inference about whether the treatment (independent variable) causally affected the dependent variable.