A taxon (plural taxa) is a level of classification within a scientific system that categorizes living organisms based on their physical characteristics.

A total quality management (TQM) is a system that is implemented in every aspect of an organization with the focus of providing quality; 

A Typical is not a specific individual or even the average over a group of individuals.

It means a person living at the centroid (center of population mass) of a census tract and engaging in a range of activities (indoors and outdoors) that are representative of those in which individuals might engage.