Omnibus Survey 1996 - South Africa

Abstract
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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 probability sample of about 2200 respondents in the whole country (South Africa). The 1996 February omnibus consisted of two separate samples of 2200 each – one sample having a yellow questionnaire and the other sample having a pink questionnaire. The February/March 1996 omnibus survey was undertaken over the period 27 February to 24 March 1996. The data from this survey was available in May 1996. The fieldwork was done on a countrywide basis including all nine provinces.

Geographic coverage
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National coverage

Analysis unit
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Units of analysis in the survey included individuals

Universe
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The universe included all household residents 18 years old or older.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The South African population of persons 18 years and older was stratified according to:
Province (Western Cape, Eastern Cape, Northern Cape, Orange Free State, Natal/KwaZulu, Eastern Transvaal, PWV, North Western Province, Northern Transvaal)
Socio-economic classification:
Rural areas in former self-governing and TBVC states
Squatter areas in former non-white urban (metro and non- metro areas)
Hostels and hotels
Former urban areas for coloureds
Former urban areas for a Asians
Former urban areas for blacks
Former urban (non- metro) areas for whites
Former urban (metro) areas for whites
Rural areas, excluding the former self-governing and TBVC states

The sample allocation to these strata was done roughly proportional to the adjusted 1991 populatio n census figures with a few exceptions, among which was to ensure a minimal provincial total of 120. Multistage stratified cluster (probability) sampling was used to draw the respondents with the adjusted 1991 population census figures as measure of size. Census enumerator areas and similar areas were used as the clusters in the pen-ultimate sampling stage, from which an equal number, viz. one or two by four households were drawn. All clusters were drawn with probability proportional to size, whilst households were drawn from the final clusters with equal probability (systematically). Respondents were drawn at random from qualifying household members. In addition, population of live-in domestic workers was sampled in relation to their residence in already drawn households.

Mode of data collection
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Face-to-face [f2f]

{'Abstract': '本季度进行的综合调查旨在为客户提供一个以低成本参与全国性调查的机会。众多客户的问题被整合为一个问卷。该问卷通常在全国范围内对约2200名受访者进行概率抽样调查（南非全国）。1996年2月的综合调查包括了两个各2200人的独立样本——一个样本使用黄色问卷，另一个样本使用粉色问卷。1996年2月至3月的综合调查于1996年2月27日至3月24日进行。该调查的数据于1996年5月可用。调查工作在全国范围内进行，包括所有九个省。', 'Geographic coverage': '全国覆盖', 'Analysis unit': '调查的分析单位包括个人', 'Universe': '调查的总体包括所有18岁及以上的家庭居民', 'Kind of data': '样本调查数据 [ssd]', 'Sampling procedure': '南非18岁及以上的成年人口根据以下标准进行了分层：
省份（西开普省、东开普省、北开普省、橙色自由州、纳塔尔/夸祖鲁、东德兰士瓦、PWV、西北省、北德兰士瓦省）
社会经济分类：
前自治州和TBVC州的农村地区
前非白人城市（都市和非都市地区）的棚户区
宿舍和酒店
前有色人种城市地区
前亚洲人城市地区
前黑人城市地区
前白人（非都市）城市地区
前白人（都市）城市地区
农村地区，不包括前自治州和TBVC州
这些层级的样本分配大致与调整后的1991年人口普查数据成比例，其中一些例外是为了确保每个省份的最小总数为120。采用多阶段分层聚类（概率）抽样来抽取受访者，以调整后的1991年人口普查数据作为规模测量标准。在次级抽样阶段，使用了人口普查员区域和类似区域作为聚类，从中抽取相等数量的家庭，即每四个家庭抽取一或两家。所有聚类均以规模成比例的方式抽取，而家庭则从最终聚类中以等概率抽取（系统性地）。受访者从符合条件的家庭成员中随机抽取。此外，对居住在已抽取家庭中的住家工人的群体也进行了抽样。', 'Mode of data collection': '面对面 [f2f]'}