PISA 2009 Technical Report

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The PISA 2009 Technical Report describes the methodology underlying the PISA 2009 survey. It examines additional features related to the implementation of the project at a level of detail that allows researchers to understand and replicate its analyses. The reader will find a wealth of information on the test and sample design, methodologies used to analyse the data, technical features of the project and quality control mechanisms.


Survey Weighting and the Calculation of Sampling Variance

Survey weights are required to analyse PISA data, to calculate appropriate estimates of sampling error and to make valid estimates and inferences of the population. The PISA Consortium calculated survey weights for all assessed, ineligible and excluded students, and provided variables in the data that permit users to make approximately unbiased estimates of standard errors, conduct significance tests and create confidence intervals appropriately, given the complex sample design for PISA in each individual participating country.


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