Statistical processing
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Science, technology and cultureAnne Vibeke Jacobsen
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The results of the survey are grossed-up to ensure their representativeness. After collecting the data, the sample is grouped by a number of background variables, such as age and gender. Each answer gets a 'weight' that correct possible biases. The calculations are done by a regression estimator.
Source data
The survey is based on a questionnaire.
Frequency of data collection
The data is collected annually.
Data collection
Web form and telephone interviews.
Data validation
The data is compared to last years results.
Data compilation
The data is compared to last years results are filter checks are made.
Adjustment
No further corrections are undertaken than those already described under validation and treatment.