Differentiate survey and experiment. When to use survey and experiment? ​ -

"Survey refers to a technique of gathering information regarding a variable under study, from the respondents of the population. Experiment implies a scientific procedure wherein the factor under study is isolated to test hypothesis.

Experiments are used for physical or natural scientific studies. Surveys are mainly used for social or behavioural sciences. Manipulation of variables is done in experiments to understand a theory better. In a survey, no manipulation of variables is needed."