The study was based on a sample of half the nation's public schools.

Their analysis is based on a sample of data from a Texas school district.

We've been trying to base our knowledge on a single sample.

The study was based on a sample of 9,000 trees across the country.

He was doing some work on samples of those too.

Only not, she knew for sure, on a sample quite like this.

It says this was based on a sample of 108 patients.

How did you get your hands on a sample and the formula?

To say you do, based on such a small sample, is ridiculous.

The survey was based on a sample of 2,000 interviews.