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Dewis pwnc arall neu clirio pob hidlydd.
Rhyddhawyd ar: 27 February 2020 | Methodoleg
Understanding the reliability and accuracy of Long-Term International Migration estimates, including sampling distribution, sampling error, statistical significance and confidence intervals.
Rhyddhawyd ar: 7 July 2026 | Methodoleg
The quality of the linkage of Census 2021 to the Office for National Statistics Longitudinal Study, including tracing rates, sampling fractions, and forwards and backwards linkage rates.
Rhyddhawyd ar: 31 August 2018 | Gwybodaeth gorfforaethol
A strength of the Opinions and Lifestyle Survey (OPN) is a robust methodology and commitment to high-quality data. Following comprehensive research and testing, a new, innovative approach to sampling was adopted on the survey from April 2018. This approach, as well as a change in mode of collection from face-to-face to online collection with an alternative of telephone interviewing, means that the survey will continue to offer high-quality data at a reduced cost.
