An omnibus survey is done quarterly and its purpose is to give clients an opportunity to participate in a national survey at low cost. A number of clients' questions are combined into one questionnaire. This questionnaire is usually administered to a probability sample of 2 200 respondents in the whole country (South Africa). The 1996 February omnibus consisted of two separate samples of 2 200 each - one sample having a "yellow" questionnaire and the other sample having a "pink" questionnaire. The fieldwork was done on a countrywide basis, including all nine provinces. Interviewers specifically trained in personal interviewing collected the data. The respondents were scientifically selected and interviewed at home. The interviews were condu...