Accuracy and reliability

Overall accuracy

Statistics Denmark believes that the size of random samples taken from source is satisfactory for instances of data based on random samples. No random sample uncertainties are calculated, which means there is no precise indication of any uncertainty for them. Please refer directly to the source for further details concerning overall reliability.

Sampling error

Report on sampling errors from Gallup Report in Danish

Non-sampling error

Please look at the original sources.

Quality management

Statistics Denmark follows the recommendations on organisation and management of quality given in the Code of Practice for European Statistics (CoP) and the implementation guidelines given in the Quality Assurance Framework of the European Statistical System (QAF). A Working Group on Quality and a central quality assurance function have been established to continuously carry through control of products and processes.

Quality assurance

Statistics Denmark follows the principles in the Code of Practice for European Statistics (CoP) and uses the Quality Assurance Framework of the European Statistical System (QAF) for the implementation of the principles. This involves continuous decentralized and central control of products and processes based on documentation following international standards. The central quality assurance function reports to the Working Group on Quality. Reports include suggestions for improvement that are assessed, decided and subsequently implemented.

Quality assessment

The tables are based on either the Danish Business Authority which examines a very large part of the market or TNS Gallup, Annunal Survey, which is a sample studies conducted three times a year with a sample of about 3000 households each year.

For further considerations regarding. overall reliability refers directly to the sources.

Data revision - policy

Statistics Denmark revises published figures in accordance with the Revision Policy for Statistics Denmark. The common procedures and principles of the Revision Policy are for some statistics supplemented by a specific revision practice.

Data revision practice

Only final figures are published. However, in certain cases the tables can be updated with new figures for previously published periods. This is because the source material publishes updated and corrected data.