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95% confidence intervals for the 2001 Census result.
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Details of other issues that affected the quality of the 2001 Census data.
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Imputation rates for key variables for local authorities and wards.
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Quality indicators, imputation rates and One Number Census quality assurance information for each local authority in England and Wales.
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Quality indicators and background information for health areas and postcode sectors.
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Household and person response rates.
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Results of the One Number Census Quality Assurance Process
Background information and reports about the quality of 2001 Census data including a range of measures of data quality.