Badania ankietowe w oparciu o próby nielosowe z wykorzystaniem programu SPSS

The design‐based approach in sampling survey is widely used in market research and opinion poll companies, but it can be used if and only if the sample is random, which is quite rare in practice. In the paper, the problem of mean and fraction prediction is considered, basing on the purposive sample using the model approach in sampling survey. The survey is conducted by using the CAWI method. The purpose of the paper is to present functions in the IBM SPSS Syntax language prepared by the authors.