PPS sampling is often used in cluster sampling, where you select clusters (or groups of sampling units) of varying size in the first stage of selection. For example, clusters may be schools, hospitals ...

Armenia, in collaboration with the World Bank and WorldPop, has developed its first digital pre-census sampling frame using ...

LAKELAND, Ga. (WSAV) – The first positive case of Chronic Wasting Disease (CWD) in Georgia was confirmed Wednesday by the ...