Documentation of statistics: Home Appliances (Discontinued)
As it is not possible to interview all 1,500 persons, each completed interview is given a personal weight, which corrects the effects of non-sampling and non-response (including no telephone) and ensures that the results cover the whole population in the sample.
https://www.dst.dk/en/Statistik/dokumentation/documentationofstatistics/home-appliances---discontinued-
Documentation of statistics