Or, at least that is one possible reading of this following example from HESA's Guidelines for the use of the DLHE Longitudinal Survey Dataset. To illustrate how this is done:Black, mixed and other ethnic group graduates accounted for 21.9% of the selected Sample A. From the initial census it is known that these graduates represent … Continue reading how HESA normalises black, mixed and other ethnic group graduates to reduce their impact by a quarter! http://bit.ly/gsVwv