What is a DLL file? DLL files, also called Dynamic Link Libraries, contain a collection of executable functions and information that can be used by a variety of Windows programs. A .DLL file cannot run on its own. It is loaded and used by a program executable (EXE file), so you should not try to run them on their own.
Ideally, this is a population at risk. The study population is the population from which sample is to be drawn. Commonly, the population is found to be very large and in any research study, studying all population is often impractical or impossible. Therefore, sample unit gives researchers a manageable and representative subset of population.
DEFINITION of 'Representative Sample'. A subset of a statistical population that accurately reflects the members of the entire population.