From the CDC:
NATS Methodology at a Glance
The NATS was designed as a stratified, national, landline and cell phone survey of non-institutionalized adults 18 years of age and older. It was designed to yield data representative and comparable at both national and State levels.
Each state is divided into at least three strata: a listed landline stratum, a not-listed landline stratum, and a cell phone stratum. The target number of landline completes per state was 1863. Target number of cell phone completes per state varied in proportion to each state’s population.
NATS fielding occurred between October 20, 2009 and February 28, 2010.
Mississippi:
Landline completes: 1,761
Cell completes: 42
Total completes: 1,803
