For example, clusters may be schools, hospitals, or geographical areas, and the final sampling units may be students, patients, or citizens. Cluster sampling can provide efficiencies in frame ...

Representative samples and sampling are addressed multiple times in the cGMPs. For example, in Part 21 of the Code of Federal Regulations, section 211.84 (b), it states: "Representative samples of ...

New European Pharmacopoeia chapter aims to resolve problems with applying the harmonized UDU test to large sample sizes. Recent development in analytical technology has made possible the fast ...

The example in the section "Stratified Sampling" assumes that the sample of students was selected using a stratified simple random sampling design. This example shows analysis based on a more complex ...