Preposition: of

• child: Fifty-nine children and a subsample of 10 children of the same age who attended specialist regional schools participated in further investigations.

Adjective modifier

• representative: The data were derived from a nationally representative subsample of students who participated in the 2002 main NAEP reading assessment.

Modifies a noun

• Z: The subsample Z - Z v is used to construct the predictor d.

• survey: Subsample surveys In addition to the full cohort studies, four subsample surveys have been carried out.