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Dewis pwnc arall neu clirio pob hidlydd.
Nid yw holl gynnwys y cyfrifia wedi'i ryddhau. Edrychwch am ddatganiadau sydd i ddod ar y calendr datganiadau. Fel arall, gallwch greu set ddata eich fun.
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.
