Post-enumeration Survey (PES) - Statistics South Africa

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Statistics South Africa ii Post-enumeration Survey (PES) / Statistics South Africa Published by Statistics South Africa, Private Bag X44, Pretoria 0001 © Statistics South Africa, 2012 Users may apply or process this data, provided Statistics South Africa (Stats SA) is acknowledged as the original source of the data; that it is specified that the application and/or analysis is the result of the user's independent processing of the data; and that neither the basic data nor any reprocessed version or application thereof may be sold or offered for sale in any form whatsoever without prior permission from Stats SA. Stats SA Library Cataloguing-in-Publication (CIP) Data Post-enumeration Survey (PES) / Statistics South Africa. Pretoria: Statistics South Africa, 2012 Report no. 03-01-46 84 pp ISBN 978-0-621-41394-6 A complete set of Stats SA publications is available at Stats SA Library and the following libraries: National Library of South Africa, Pretoria Division National Library of South Africa, Cape Town Division Library of Parliament, Cape Town Bloemfontein Public Library Natal Society Library, Pietermaritzburg Johannesburg Public Library Eastern Cape Library Services, King William’s Town Central Regional Library, Polokwane Central Reference Library, Nelspruit Central Reference Collection, Kimberley Central Reference Library, Mmabatho This publication is available on the Stats SA website: www.statssa.gov.za For technical enquiries please contact: Nathi Gama Tel: 012 310 8620 / 8394 Email: nathig@statssa.gov.za For dissemination enquiries please contact Printing and Distribution, Statistics South Africa Ina du Plessis Email: inadp@statssa.gov.za Post Enumeration Survey (PES)
Statistics South Africa iii EXECUTIVE SUMMARY Background Statistics South Africa (Stats SA) conducted the Post-enumeration Survey (PES) for Census 2011 shortly after the completion of census enumeration, from November to December 2011. The main goal of the PES was to evaluate the coverage and content errors of the census. The PES was an integral part of the Census 2011 programme, but institutional arrangements were put in place to maintain the independence of PES operations to ensure that the results of the PES were not biased. Fieldwork methodologies and procedures for the PES were adapted from census methodology documents since the PES replicates the census (in sampled enumeration areas (EAs)). A sample of 600 EAs was drawn from the census EAs and allocated to the provinces, based on expected standard errors which were based on those obtained in PES 2001. The PES questionnaire was a shorter version of the census questionnaire and comprised only the elements required for measuring coverage. The matching and reconciliation visit exercise commenced after the completion of fieldwork operations. This exercise involved the comparison of household and person records in census data and PES data, and re-visits to households in order to confirm or get more information that would assist in matching unresolved cases. Evaluation of coverage error Dual-system estimation was used to evaluate coverage errors and derive the true population of the country. The evaluation of coverage errors was restricted to dwelling units (DUs) in EAs that were within the scope of the PES, i.e. it only represents populations in all other EA types excluding student residences, institutions, tourist hotels/motels/inns, homes for the aged (unless they are structured into separate households), and homeless people. The EA type 'Collective Living Quarters', which includes hostels (in-scope for PES) was out of scope during sampling. However, hostels, residential hotels and homes for the aged found in the PES sample EAs were enumerated for the PES. The PES estimated the South African population to be 49,79 million people as at 09–10 October 2012. The uncorrected census count (including erroneous inclusions) was estimated to be 42,51 million, whilst the corrected count (excluding erroneous inclusions) was estimated at 42,08 million. The PES results indicate that Census 2011 omitted 6,29 million persons. The net undercount relative to the 49,79 million in the true population is thus 14,6%. The highest undercount was observed in Western Cape with an undercount of 18,5%. Evaluation of content error For the measurement of the correctness of responses between census and PES, the rate of agreement, net difference rate and index of inconsistency were used. The variables under consideration were sex, age group, population group, marital status and relationship to head of household. The variable 'sex' had the highest rate of agreement of 0,99 and lowest index of inconsistency of 2,5. Post Enumeration Survey (PES)
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