Accuracy and reliability

Overall accuracy

The statistics are compiled on the basis of a sample population and consequently, the results are subject to some degree of statistical uncertainty. The statistical uncertainty differs for each individual item, and the largest degree of uncertainty is seen for the item investments, which may vary considerably among the farms or over time.

From the population of small enterprises, where the variation is small, a relatively small sample is selected, while from the population of large farms, where the variation is greater, a larger sample is used.

Sampling error

Uncertainty calculations are not calculated for the statistics. The publication mentioned below about agriculture has a chapter about reliability for some main figures in the statistics.

Non-sampling error

Uncertainty calculations are not calculated for the statistics.

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

. It is calculated on basis of the 3 accounts statistics on agriculture, fishery and aquaculture, which all are considered to be of a high quality. The sample size for agriculture is about 7 per cent while data for more than half of the population of aqauculture and fisheries enterprises are collected.

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 estimated.