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Coverage assessment and adjustment methods

The main aim of coverage assessment and adjustment methodology was to estimate, and adjust the census data for the number of people and households not counted in the 2011 Census. A secondary objective was to identify and adjust for the number of people and households counted more than once, or counted in the wrong place, in the 2011 Census.

Resources available to download are:

  • Coverage assessment and adjustment process: An overview of the estimation and adjustment process and how the individual components of estimation fit together. Data on the components of change for each local authority are also available as an Excel file.

  • Estimation and adjustment for communal establishments: Details of how coverage was measured and adjusted for within communal establishments. This paper was first published in July 2012 and was updated in September 2012.

  • Within-household bias adjustment: A summary of the method and the results of the tests for within-household bias.

  • Household bias adjustment: A summary of the methods used to test and adjust for household bias and full details of the components of each alternative household estimate in an Excel file.

  • Tuning the coverage estimation process: Outlines the methods used to improve coverage estimation including details of the strata collapsed and out of scope postcodes in an Excel file Annex. The Annex spreadsheet was first published in July 2012 and was updated in September 2012.

  • Overcount estimation and adjustment: A summary of the method and results of estimating for overcount and how it was adjusted for in producing the census population estimates. Overcount figures are included in an Excel file.

  • Making a national adjustment for residual biases: A description of the evidence and methods used to make a national adjustment and how this was geographically distributed.

Read more about the development and implementation of coverage assessment and adjustment processes

Content from the Office for National Statistics.
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