Relying upon or derived from observation or experiment (from Latin and Greek words meaning "experience")
The empirical method is generally taken to mean the approach of using a collection of data to base a theory or derive a conclusion in science. It is part of the scientific method, but is often mistakenly assumed to be synonymous with the experimental method. The empirical method is not sharply defined and is often contrasted with the precision of the experimental method, where data are derived from the systematic manipulation of variables in an experiment. Some of the difficulty in discussing the empirical method is from the ambiguity of the meaning of its linguist root: empiric.