The group was chosen to provide a rough cross section, but it did not constitute a scientific sample.

In no way do they constitute a scientific sample.

The arrested man has been released on bail until the results of scientific samples are known.

Not a scientific sample I know but enough to put me off.

It is the first time such numbers have been collected in a nationwide scientific sample.

The major tests are first given to a scientific sample of students around the country.

Granted, the opinions of 50 to 60 people, all told, hardly constitute a scientific sample.

Those tested ranged from 16 to 65 years of age, and were selected as a scientific sample of the adult population.

In addition, the shuttle is to bring back about a ton of scientific samples, equipment and other material from the Russian craft.

I would be more comfortable with a more scientific, representative sample.