Data were collected from a representative national sample of 3,000 departments.

They were also more likely than the national sample to have been in trouble with the law.

You won't get much detail from a national sample of 50,000.

The study's national sample of 46,800 children was heavily white and Midwestern.

Following the sampling, each country is left with a representative national sample of its public.

Women in this national sample were interviewed every two years.

There were only 282 respondents in the radio portion of the national sample.

The finding comes from a national sample of 3,287 kids aged 12-19.

The trends for the 2 national samples were quite different.

The test was administered to a national sample of 23,000 students in 1,100 public and private schools.