Transcript Evaluation And Adjustment Of The 2008 Census Age & Sex Data.

Evaluation And Adjustment Of The 2008
Census Age & Sex Data
Introduction
 Information on age and sex is important because
many of the other characteristics of the
population such as fertility, mortality, migration,
education, marriage, household formation,
economic activity health, food and other
consumption needs etc. are highly related to age
and sex.
Objectives
 Studies from different African countries show that
the majority of data collected are riddle with
errors, Sudan being no exception. Therefore the
specific
 objectives of the study are:
 To evaluate the 2008 age and sex data.
 To adjust the 2008 age and sex data.
Methodology
 Sex Ratio.
 Population pyramid
 Intercensal Cohort Analysis.
 In an attempt to examine the nature of
errors in 2008 census,
methods will be used.
 Whipple Index
 Myers Index.
several
Methodology ..cont.
 Age Ratio.
 U. N. Joint Score.
 Comparisons with population
models. To compare the
actual percent distribution by
an expected age distribution
of stable population model.
Sex Ratio
Year
1955/1956
1973
1983
1993
2008
Population (000)
Region
Sex Ratio
Sudan
Sudan
Sudan
102
103
102
Sudan
104
N. Sudan
101
S. Sudan
113
Sudan
N. Sudan
S. Sudan
105
105
108
Overall Survival Ratios (OSR) by Region and
Sex Sudan 1993-2008
Region
Overall Survival Ratios
Females
Males
Northern
Eastern
0.85
0.83
0.84
0.87
Khartoum
1.31
1.34
Central
0.62
0.56
Kordofan
0.72
0.64
Darfur
1.43
1.49
Whipple’s index shows that the age
data for Sudan should be regarded as
“rough “ . However, there has been a
slightly improvement in the quality of
age data in the 2008 census in
comparison with the earlier censuses.
Sex
Males
Females
1983
1993
Sudan
2008
280.0
286.3
255.7
279.5
218
234
Myers Index for Males and Females, 2008
Digit
Male
Sudan 2008
Female
0
1
2
3
12.0
5.1
0.5
3.0
13.3
5.6
0.3
3.6
4
5
6
9.5
7.5
2.7
3.9
8.5
3.6
7
8
9
1.8
0.6
4.5
1.8
0.3
4.4
The value of the index places Sudan in the
highly inaccurate category with score
above 40, Although an improvement has
occurred in the quality of grouped data
over successive censuses
year
1973
score
67.1
1983
1993
2008
62.2
56.6
53.5
This table indicates the omissions in age 0
and 1, and this has resulted in an excess in
the proportions in age 3 and 4.
Sex Ratio
Male %
Female %
0
1
104.8
105.9
18.1
13.9
18.3
14.0
2
106.4
23.0
22.9
3
105.3
22.3
22.5
4
0-4
107.3
106.0
22.6
100.0
22.4
100.0
Percentages of Population at Older Ages
by sex 2008 Census and Model Stable
Population
2008
Age
groups
Model population
Male
Female
Male
Female
60+
6.02
4.95
4.05
4.74
70+
2.81
2.32
1.31
1.68
80+
0.94
0.79
0.21
.31
The relative completeness of the 1993
censuses can be estimated by computing
the expected population in 1993 and
comparing it with the actual results in
2008 census. The result is shown below.
Errors of closures
Population 2008
Sudan
39154490
Expected Population 2008
38204960
Errors of closure
949530
Percent of population 2008
2.5
Shading
Labor Force
errors are detected together with
unfilled in fields in the questionnaire.
These
errors contributed to enlarge the
percentage of the unspecified entry, where
the percentage of the unspecified reached
13% in some fields.
The direct effect of these errors can easily be
seen in the low participation rate of the labor
force compared with previous censuses.
(1993 M 75.1, F 42.5)(2008 M 54.8, F 19.8)
Indirect method
Region
Both
sexes
Male
Sudan
17.5
N. Sudan
16.7
Direct method
Female
Both
sexes
Male
Female
17.7
16.8
16.0
13.1
11.0
17.2
16.3
14.59
10.6
8.7
This
Conclusion
section tried to examine the
quality of the 2008 data by using
different analytical techniques .
The 2008 population census yield, as
the past censuses the age distribution
is subject to:
Omission of children 0-1
An exaggeration of the
older persons 60+
ages of the
Conclusion ..cont.
 Preference
for particular digits like
0,5.despite the efforts made in the 2008
census, the deficiencies in the age data
persist as shown by Whipple’s index Myers
index and the United Nation joint scores,
Although there has been an improvement in
the quality of data in the 2008 census in
comparison with 1993 census, but still the
quality of age sex data is defected.
Adjustments is applied for the age 0-4 and
the population numbers using demographic
formulas.
Recommendations
 Needs of more efforts in the
selection and training of the
data collectors in the future.
 Completeness
of civil and
birth registrations.