The questionnaires are checked in order to ensure the quality of the answers, that the respondents have been asked all the questions in the questionnaire, that the time limits set for field work have been observed, as well as the individual response percentages, etc. A number of persons in the sample refuse to be interviewed, and a number of persons cannot be interviewed because of absence on a journey, activities outside the home, etc. 950 persons out of a representative sample of approx. This large response percentage is, among other things, due to the fact that the interviewers make at least three re-visists to the households until an interviews can be obtained or has to be given up. The material is weighted to compensate for losses, i.e. for the distortion which may be the result of the fact that the non-obtained interviews may be distributed atypically in relation to the total sample.
Weighting is carried out concerning degree of urbanization, sex and age.
However, in some cases supplementary variables are used when considered necessary. Demokrati og politisk kultur. Dansk Sociologi, nr. The respondent's position in the household is given as head of household, housewife or other adult.