Sampling Challenges

Getting the appropriate sample of individuals from the population of interest is critically important for confidence in the study’s results. For most projects (but not all), HSRC has a strong preference for probability samples.




HSRC can help individual researchers develop appropriate sampling designs and sample sizes to meet the specific research goals of the project, whether they are trying to reach households or businesses.

Dr. Hembroff has successfully designed samples for hundreds of surveys of various types:


  • cross-sectional samples and panel samples;
  • samples from discrete lists of targeted populations (such as currently enrolled students, members of professional associations); 
  • random digit dial samples (both landline and cell phone) of city, county, statewide and national populations; 
  • random samples of rare populations; and 
  • simple or disproportionate stratified samples