Chapter 14: Sampling Design - OECD

Chapter 14: Sampling Design Leyla Mohadjer, Tom Krenzke and Wendy Van de Kerckhove, Westat This Chapter presents information about the PIAAC Main Study sample Design and selection results. Participating countries were required to develop their sample Design and selection plans according to the standards provided in the PIAAC Technical Standards and Guidelines (TSG). and to submit their plans to the Consortium for approval. The sample Design plans included information about Sampling frames and their coverage, providing descriptions of the national sample designs that included stages of Sampling , probabilities of selection, Sampling units and sample sizes. The sample selection plans included detailed information about the processes for sample selection at each stage of Sampling . In addition, the countries were required to complete and submit quality control sample selection forms to the Consortium to verify that the sample selection was conducted in an unbiased and randomized way consistent with PIAAC standards.

Frame noncoverage rates (see section 14.2.2) were limited as much as possible so that no extensive biases are introduced as a result of noncoverage of some subgroups of the population. 14.2.1 Sampling frames . PIAAC standards require that sampling frames be up to date and include only one record for

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