In statistics, a population is the group on which information is being gathered and analyzed. A sample is a representative selection of the population.

In statistics, a representative sample should be an accurate cross-section of the population being sampled. Although the features of the larger sample cannot always be determined with precision ...

This gave us a much larger sample to analyze, and made the estimates for Hispanics more precise. If we just stopped here, estimates for the total population would overrepresent Hispanics. Instead, we ...

Nationwide population sample survey launched; Xi extends greetings to elderly on eve of China's Seniors' Day; Jiangsu steps up efforts on affordable, reliable childcare ...