Accuracy and reliability

Overall accuracy

For the reference year 2023 there are 358 enterprises in the statistics and a useful response rate of 91 pct., covering 99 pct. of the total turnover of the population. The lapse is due to wrong industry code and closure of the enterprises and non-responded questionnaires. The usable data from the enterprises grossed up to the total level (the target population) of the 6-digit industries within the sector for Legal activities by using preliminary turnover from the Accounts Statistics for Non-Agricultural Private Sector.

Sampling error

The sampling error is equal to zero, as it is a total count.

Non-sampling error

The population is defined by the industry concerned, which the enterprises are registered with in the Business Register by themselves. Errors of classification of the industries will be expected. This means that there may be enterprises in the population that really should not be classified within the concerned industry, but also companies in the concerned industry can be classified with the wrong industry. In the context of fault tracing and quality assurance of the statistics, a number of these errors are continuously found and corrected. Companies that are incorrectly classified within the concerned industry incorrectly increases the number of included enterprises. On the other hand there will be less enterprises in the population if they are classified entirely outside the concerned industry, even though they should properly be classified within the concerned industry, which can be difficult difficult to detect, but can be found also. The significance of these coverage problems are generally small because the volume is estimated to be small. Uncertainty due to lapse, incorrectly reported numbers and misunderstandings has sought to minimize by repeated reminders by non-reporting, as well as by substantial verification of the reported figures. Generally the services in the questionnaire are based on Statistical Classification of Products by Activity CPA CPA 2008, with an adjustment to Danish conditions. It can be an uncertainty in the distribution of turnover and export by services when the services CPA 2008 are not quite commensurate with the classification of products of the firms. There were 325 useable questionnaires within the population of 358.

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 quality is estimated to be high as the statistics is based on a total count with a high response rate. Furthermore because because the statistics uses the turnover from the Accounts Statistics for Non-Agricultural Private Sector. The figures are preliminary and will not revised in the national publishing. For delivery to EU the figures are calculated (revised) based on the turnover in the final version of the Accounts Statistics for Non-Agricultural Private Sector.

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

The publication is not revised, since the statistics is published once a year.