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Lesotho 2006 Census Data Processing 4th Africa Symposium on Statistical Development 09 – 13 February 2009 Luanda Angola

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Lesotho 2006 Census Data Processing 4th Africa Symposium on Statistical Development 09 – 13 February 2009 Luanda Angola Powered By Docstoc
					       Lesotho 2006 Census Data
              Processing

      4th Africa Symposium on
    Statistical Development, 09 –
    13 February, 2009, Luanda,
                Angola
                           Presented
                              By
Friday, May 04, 2012
                       ‘Matsotang Tsietsi   1
          Objectives of This Presentation

• Sharing Lesotho’s experience in processing
  data for the 2006 census.

• For Africa to decide on the proper methods to be
  adopted on processing of the census data. That
  is choosing between the manual data
  processing and the use of the modern
  technology, scanner.


Friday, May 04, 2012                             2
          The Outline of the Presentation

• This presentation is divided into five sections
1) Background information
2) Methods of processing the Lesotho 2006
   census data
3) Challenges
4) Where we are now
5) Summary



Friday, May 04, 2012                                3
                   Background Information

• Lesotho conducted Population and Housing
  Census on the 13th April 2006.
• The enumeration covered the whole country, the
  ten districts, 80 constituencies, 120 community
  councils, 4 agro -ecological zones and the urban
  and rural areas.
• The constituencies were also divided into
  enumeration areas, and those were 4,250 and
  the same figure represented the number of the
  enumerators engaged.

Friday, May 04, 2012                             4
           Background Information Con..

• After data collection for census had been
  completed, and all the census materials had
  been retrieved from the field, manual
  compilation of data for the production of the
  census preliminary results commenced.
• Although this process was hindered by different
  post census activities, the process was
  completed in July 2007.




Friday, May 04, 2012                                5
             Methods of Data Processing

• There were two methods Lesotho had to choose from
  when entering the 2006 census data, that is the
  scanning and the manual data entry.
• The use of scanning method was the first choice as
  Lesotho had used it successfully, with minimal problems,
  for processing data for the 2002 Core Welfare Indicator
  Questionnaire Survey (CWIQ), for which we got funding
  and technical assistant from the World Bank. We also
  used the scanner during the 2006 census Pilot.
• During CWIQ survey, the questionnaires were retrieved
  from the field and scanned as soon as they reach the
  headquarters. Hence this reduced the problem of
  damaged Questionnaires.
Friday, May 04, 2012                                     6
           Methods of Data Processing…

• CWIQ however was a sample survey and had covered
  only 6,780 households, as such it was manageable data.
• During the main census data entry, the questionnaires
  were not as clean as they were handled by many hands,
  eg. While preparing for the release of the census
  preliminary results, extracting the population 17 years
  and above for the Independent Electoral Commission
  (IEC) and during the editing and coding exercise.
• Two scanners were purchased from the Republic of
  South Africa (RSA), and processing of the census data
  commenced in September 2006 after the release of the
  census preliminary results.
Friday, May 04, 2012                                    7
                   Methods of Data Processing (Cont.)


• The two softwares of CSpro and Teleform were used
  during the scanning exercise, and four of our IT
  personnel were trained for these softwares in RSA.
• For the questionnaires which were not visible for the
  scanner, because of its sensitivity, or were band at the
  corners during packaging, the manual data entry
  method was adopted.
• In February 2008,realising the problems encountered
  with the scanning method, the BOS resorted to the
  manual data entry in march, and this activity was
  completed in July 2008.
• At that time three of the ten districts had been
  completely scanned, while two were partially scanned.
Friday, May 04, 2012                                     8
                       Challenges

• Scanning of the census data was chosen by Lesotho
  because it was known to be faster than the manual
  data entry, as such, it speeds up the process of
  releasing the census results.
• It took Lesotho five years to release the 1976 and
  1986 census results. However, the results of the 1996
  census were released within two years.
• Since the scanners were bought from RSA, it follows
  that its maintenance also was not within the country.
• Thus, they took much time to get back to us. In the
  Meantime the processing of data was not in progress.
Friday, May 04, 2012                                      9
                       Challenges (cont)

• The methods of purchasing the consumables took a
  long time because of the bureaucratic procedures,
  and they could only be bought from RSA.
• At the beginning of the data entry, the data
  processing activity was not treated like a project
  activity ,whereby the data processing staff worked
  within the normal working hours, and yet they were
  also responsible for support.



Friday, May 04, 2012                               10
                       Where we are now

• In August 2008, data cleaning commenced, and
  it had engaged an international consultant from
  UNFPA. However, this activity continued until
  the first week of January 2009 when the first set
  of census tables was produced.
• The census data analyses team (CDAT) was
  invited during the second week of January 2008
  to review the census tables, and the following
  problems were discovered:

Friday, May 04, 2012                              11
                 Where we are now (Cont)

• There were some inconsistencies among the
  tables, whereby the figures for most topics did
  not correspond.
• The census data was collected from the
  constituencies within the districts, and there are
  some constituencies which overlap. It was
  realized that this had created a lot of problems
  with this structure, and to relocate the population
  of the two districts was a big problem.
• It was also discovered that during scanning of
  the data, some figures had shifted.
Friday, May 04, 2012                                12
                       Summary

• Poor Questionnaire handling by Enumerators
  resulted in the delay in scanning exercise
• Frequent handling of questionnaires for different
  purposes before scanning was also a problem
  (extraction of 17+ yrs population for IEC,
  preparation for the production of the of total
  population for the preliminary results)
• Faint bubbles of responses resulted in some of
  the response bubbles being too faint to be
  picked by the scanner hence required a lot of
  verification.


Friday, May 04, 2012                              13
                       Summary (Cont)

• Printing errors, some of the pages of the
  questionnaires were twisted during printing and
  some responses could not be picked up by the
  scanner.
• Unavailability of consumables in the local market
  hampered the scanning process, because all
  consumables had to be ordered from RSA and
  it usually took more than two weeks to be
  delivered.
• Electric Power Load shading was also a problem
  in Lesotho during the months of April to July
Friday, May 04, 2012                              14
 That’s the End

Khotso Pula Nala

				
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