Manual Data Processing of Census Data

2004 Population and Housing Census

Statistics Sierra Leone

Thekeka Moses Conteh

Sierra Leone

Population Figures of Sierra Leone

Year Population 1963 2,180,355 1974 2,735,159 1985 3,515,821 2004 4,976,871

Administrative Division

Administrative Blocks Number Region/Province 4 District 14 Chiefdom 166 Sections 1,321 Enumeration Area 9,673 Localities 16,734

FINAL FIGURES OF 2004 CENSUS

Total Population 4,976,871 Males 2,420,218 Females 2,556,653 Household Population 4,930,532 Special Groups Population 46,339 Enumeration Area 9673 Total Number of Households 819,854 Average Household Size 6.0

Planning

Office and Equipment / Accessories Personnel Scheduling and timing Budgeting

Office Preparation / Installations

Server Room Data Entry and Verification Room Coding Room Store Room

Installation Power supply Air conditioners specifications Specifications for computers, printers, backup systems etc. LAN with star topology.

Recruitment and Training of Personnel

Data Processing Consultant 1 Census Database Manager 1 Census IT Manager 5 Coding Supervisors 4 Verifying Supervisors 12 Data Entry Supervisors

50 Coders 40 Verifiers 120 Data Entry Operators

Receiving and Batching

5 Coding Supervisors

To receive the questionnaires from logistics office on behalf

Census Data Processing Unit

To batch the census questionnaires in EA order in the store

for processing

Programming (a)

Main Application SOFTWARE The Integrated Microcomputer System (IMPS) developed by US Bureau of the census – is a

system for entry, editing, tabulation and management of census and survey data.

MODULES Data Dictionary (DATADICT)

Data Entry (CENTRY)Data Edit And Imputation (CONCOR)Publication Tabulation (CENTS)Quick Tabulation (QUICKTAB)Table Retrieval (IRS)Variance Calculation (CENVAR)Data Entry Control (CENTRACK)Utilities Quit

Programming (b)

IMPS– Design of data structures– Data Capture– Verification– Validation– Tabulation

Other SOFTWARE– SPSS WIN Version 12.0– MS ACCESS

Training

Coders Verifiers Data Entry Operators

Operations (a)

Coding

April May June July Aug Sep Oct Nov Dec Jan Feb

10% Sample10% Sample

The Rest The Rest

Re-batchingRe-batching

Operations (b)

Data Entry / Verification / Validation / Back up / Tabulations

10% Sample

The Rest

June July Aug Sep Oct Nov Dec

Primary Data Processing Flow

Main Data Entry

Structure Check

Verification Data Entry

Backup Raw Data

Secondary Editing

Backup Final Data

Secondary Data Processing Flow

Export Data from IMPS

Import Data into SPSS

Set up a Tabulation Plan

Run Tables with IMPS and SPSS

Creation of Census Databases

Population Housing Ownership Agriculture Deaths

DBMS MS-Access

Dissemination of Census Information

CDs Internet Monographs

Challenges with Manual Entry

Duplication of EA codes and household numbers

The use of F2 key in IMPS to force values that are out of range.

Transposition errors were prominent Incomplete entry of household records Incomplete entry of modules Data Verification was not effective.

Benefit of Manual Data Entry Approach

Build institutional capacity by the purchase of more microcomputers which can be used for other activities after the census.

Creates employment facility and training for more people. Data can be easily identified and keyed. Inconsistent data can be identify and resolved before

keying. Relatively less expensive Data was processed within reasonable period of eight

months.

Thank You