In the first stage, the total sample frame will be divided into six strata and representative samples of urban and rural EAs will be selected from these strata to obtain the primary sampling unit (PSU).
Sites for sampling were selected from these strata to provide representative coverage of the environment space in the region.
The sample was stratified by administrative region (Ashanti, Brong Ahafo, Central, Eastern, Greater Accra, Northern, Upper East, Upper West, Volta, and Western) and type of locality (urban/rural), resulting in 20 strata, and is nationally representative.
Seaside towns are built on strata upon strata of happy memories; a sort of emotional geology.
Thus rock strata C1 C5−1 is rock strata without deformation pressure.
But in victory, he struck a conciliatory note, saying he intended to "lock up" his political views during his five-year term and work as "the loyal representative of all Israeli citizens, of all strata, of all sections, of all classes".
Interviewers were therefore assigned a quota of households to survey from each of the four strata, on the assumption that this would ensure a representative cross-section of income levels in the overall sample.
The strata separation appears in the overburden strata of roof.
The MEPS survey has a complex survey design, which takes into account survey weights, strata and clustering of individuals in order to provide nationally representative results of U.S. non-institutionalized populations.
A stratified sampling procedure was implemented using the 2009 US Census estimate (15); strata were based on age, sex, and ethnicity to be representative of the demographic composition of the estimated 2009 US population.
