representative sample造句

To find out Helsper and Whitty (2010) recruited a representative sample of 992 British couples and asked them what is acceptable and whether they snoop on each other.

Extracurricular activities epitomize the differences in child rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.

For this study, the investigators gathered data from the British household Panel Survey - a yearly questionnaire of a nationally representative sample of UK households.