About ICF
Randy ZuWallack
Senior Statistician
Randal is a statistics expert with more than 20 years of experience, specializing in developing cost-effective, goal-oriented study designs for national, state, and local research and evaluation projects.

Randal provides statistical expertise in sampling and estimation. He develops analytic methods to address research goals and designs cost-effective methods for survey administration. Randal is a principal for our survey research business, having previously worked at Abt, and the U.S. Census Bureau.

Randal has survey and statistical experience spanning various topics, including public health and safety, outdoor recreation, and transportation, among others. He has managed projects and provided statistical expertise to numerous government agencies, including the Coast Guard, the National Oceanographic Atmospheric Administration, the Census Bureau, the Department of Housing and Urban Development, the Centers for Disease Control, and the Department of Veterans Affairs.

Areas of expertise
Education
  • M.S., Statistics, University of Massachusetts Amherst
  • B.S., Mathematics, State University of New York.
Publications
  • Boyle, J., Berman, L., Dayton, J., Iachan, R., Jans, M., ZuWallack, R. (2020) Physical measures and biomarker collection in health surveys: Propensity to Participate. Research in Social and Administrative Pharmacy. In Press.
  • Gundersen, D. A., ZuWallack, R. S., Dayton, J., Echeverría, S. A., Delnevo, C. D., (2014). Assessing the feasibility and sample quality of a national random-digit dialing cellular phone survey of young adults. American Journal of Epidemiology, 179(1):39–47.
  • Guterbock, T., Lavrakas, P. J., Tompson, T. N., ZuWallack, R. (2011). Cost and Productivity Ratios in Dual-Frame RDD Telephone Surveys. Survey Practice 4 (2).
  • Delnevo, C. D., Gundersen, D. A., Hrywna, M., Wackowski, O., Zuwallack, R. S., (2010). Estimates of cigarette smoking from the NJ Adult Tobacco Survey: real or spurious? American Journal of Health Behavior, 34(5), 585–592.
  • ZuWallack, R. S., (2009). Piloting Data Collection via cellphones: Results, experiences, and lessons learned. Field Methods, 21(4), 388–406.
  • ZuWallack, R. S., (2008). I can't believe they still call them phones. Alert! Magazine, 46(12), 25–28.