The system will also allow comparisons among different population groups.

The collection of data from both space and the air was done in order to allow comparisons.

This allowed comparison of studies from different institutions and countries.

That allows comparisons of the difference between men and women.

This will allow comparison to be made between different survey techniques.

Despite their differences, the two systems allow comparison for statistical purposes.

The surveys repeat many of the same questions, thus allowing comparison over time.

Results from the 133 trials were not initially presented in ways that allowed easy comparison.

Some countries used much larger samples than required to allow comparisons between regions.

The site was designed to allow product comparison, purchase and discussion from one central location.