Empirical information is that based on experimental data, not on a theory, most commonly practically based.

The word empirical means data accessed by means of observation or experiments. Empirical information is data procured by an experiment or observation, not by theory. One of the most foremost approaches in modern science is that all evidence must be empirical, or empirically based. The term makes reference to the use of working hypotheses that are verifiable using observation or experiment. Therefore Empirical scientific statements are subject to and collected from our experiences or observations.

See also:
Data Collection
Clinical Trial