Accuracy and reliability

Overall accuracy

All Extraction sites are obliged to submit data to The Regions and The Nature Agency. The data is very accurate. They represent a compilation of figures on the total extraction of raw materials, and the statistics provide the base for the duties which the extractors have to pay to the state. Misstatements will in most cases be discovered quickly as the responsible authority has fairly precise expectations as to the types and volumes of extracted materials.

Sampling error

The mining and quarrying statistics are based on a census sample. The sample error is 0

Non-sampling error

It is assumed, that there are no other uncertainties.

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

All Extraction sites are obliged to submit data to The Regions and The Nature Agency. The data is very accurate. They represent a compilation of figures on the total extraction of raw materials, and the statistics provide the basis for the duties which the extractors have to pay to the state. Misstatements will in most cases be discovered quickly as the responsible authority has pretty precise expectations as to the types and volumes of extracted materials.

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 statistics are published.