Cellphones Challenge Poll Sampling
A new report from the U.S. National Health Interview Survey (NHIS) reports preliminary results that have implications for surveys that rely on telephone interviews. (Wireless Substitution: Early Release of Estimates From the National Health Interview Survey, January – June 2007, by Stephen J. Blumberg, Ph.D., and Julian V. Luke, Division of Health Interview Statistics, National Center for Health Statistics.) more than one out of every eight American homes (13.6%) had only wireless telephones during the first half of 2007 Adults living in poverty (21.