Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...

Probability-based panel: This refers to a national survey panel recruited using random sampling from a database that includes most people in the population. Today, most such panels in the United ...

Discover how to determine the ideal percentage of a population for a representative sample to ensure accurate data analysis with minimal sampling error.

Statisticians drawing samples of African Americans can create efficient plans using well-known strategies (Ericksen, 1976). They can take advantage of residential segregation to select blocks with ...

The Demographic and Health Survey (DHS) programme was paused at the start of 2025 following deep cuts to the United States’ Agency for International Development (USAID). Since the middle of the 1980s, ...

Information from five ongoing studies in the United States was presented in the next workshop session to understand how other population-based studies approach the issues of genomic data collection ...