The following section covers methodology starting Wave 4 and future rounds. For methodology notes on Waves 1-3, see PDF on the CSMF Nineveh Waves 1-3 Findings page.
The statistical representation of Waves 4, 5, 6 and 7 samples is:
- At district level, 5% margin of error within a 95% confidence interval.
- At the sub-district level, between a 5% and 10% margin of error within a 95% confidence interval.
- At the ethno-religious group level per sub-district, 10% margin of error within a 95% confidence interval (only groups categorized as major and minor).
Weighting the Sample
Starting in Wave 4, sampling was stratified by sub-district and ethno-religious group to ensure large-enough sample sizes for each of these units of analysis.
However, so that survey results are representative of the actual population size of each ethno-religious group, sub-district and district, a three-step weighting methodology was applied:
- Weighting the population size for each district and sub-district adjusts the sample size to the actual population for each administrative unit. As no official or reliable population data exists, district and sub-district population size was estimated based on 2012 World Bank population estimates and the population return figures reported by IOM Iraq’s Displacement Tracking Matrix (DTM). The World Bank data is more accurate given coordination with Iraq’s Central Statistics Office, but is outdated. In particular, it does not account for significant population changes due to conflict-related displacement and other demographic movements over the last decade. By contrast, DTM data estimates these recent changes based on an aggregation of reporting from key informants. Still, the DTM data is based off of returnee movements and thus excludes any families that remained in their locations during and after the ISIS conflict. The CSMF estimates therefore take an average from both the World Bank and DTM figures per sub-district.
- Weighting for size of each ethno-religious group within a sub-district, based off of the total estimated population in a sub-district, adjusts for the proportion of ethno-religious groups who reside there. Little data on ethno-religious breakdown exists, and figures that purport to be accurate are highly contested. Therefore the CSMF takes a qualitative approach to approximate the size of the relevant groups. The initial ethno-religious composition estimates were based on DTM returns data. These proportions were then adjusted further through discussions with the enumerator teams who reside in the target areas and belong to the different ethno-religious groups themselves. The ethno-religious groups were assigned one of three categories: major (close to half of the sub-district population); minor (smaller proportion but still greater than 10% of the sub-district population); and non-negligible (roughly 10% of the sub-district population) as shown in the table below. The major category is weighted as double the minor category, which is weighted as double the non-negligible category.
- Weighting for gender balance adjusts to represent the equal presence of both genders within the district or sub-district.
To be statistically representative, sampling included 90-100 respondents from each ethno-religious group categorized as major or minor as reflected in the table below. Groups categorized as non-negligible were also sampled to give indicative results (not statistically representative). Percentages in the table below are as of Wave 7.
الموقع
|
لمكونات
|
الحجم المقدّر للسكان
|
Sinjar District
|
Sinjar Center
(24% of population in Sinjar)
|
Ezidi
|
Major
|
Shias
|
Minor
|
Sinuni
(56% of population in Sinjar)
|
Ezidi
|
Major
|
Sunni Arab
|
Minor
|
Qayrawan (starting in Wave 4)
(21% of population in Sinjar)
|
Sunni Arab
|
Major
|
Ezidi
|
Minor (not surveyed—inaccessible)
|
IDPs in Duhok
|
Ezidi
|
-
|
Tal Afar District
|
Tal Afar Center (starting in Wave 4)
(44% of population in Tal Afar)
|
Shia Turkmen
|
Major
|
Sunni Turkmen
|
Minor
|
Sunni Arab
|
Non-negligible (not surveyed)
|
Shia Arab
|
Very small (not surveyed)
|
Zummar
(27% of population in Tal Afar)
|
Sunni Arab
|
Major
|
Sunni Kurd
|
Major
|
Rabia
(19% of population in Tal Afar)
|
Sunni Arab
|
Major
|
Sunni Kurd
|
Very small (not surveyed)
|
Ayadhiya
(10% of population in Tal Afar)
|
Sunni Arab
|
Major
|
Sunni Kurd
|
None (not surveyed)
|
Sunni Turkmen
|
Minor
|
Hamdaniya District
|
Hamdaniya Center
(40% of population in Hamdaniya)
|
Christian
|
Major
|
Shabak
|
Minor
|
Kaka’i
|
Non-negligible (not surveyed)
|
Sunni Arab
|
Very small (not surveyed)
|
Bartella
(36% of population in Hamdaniya)
|
Shabak
|
Major
|
Christian
|
Minor
|
Sunni Arab
|
Very small (not surveyed)
|
Shia Turkmen
|
Very small (not surveyed)
|
Nimrud (starting in Wave 4)
(24% of population in Hamdaniya)
|
Sunni Arab
|
Major
|
Shabak
|
Major
|
Shia Turkmen
|
Minor
|
Kaka’i
|
Non-negligible (not surveyed—inaccessible)
|
Mosul District (starting Wave 7)
|
Mosul Center
(73% of population in Mosul)
|
Sunni Arab
|
Major
|
Sunni Kurd
|
Minor
|
Shia Turkmen
|
Very small (not surveyed)
|
Christian
|
Very small (not surveyed)
|
Shia Arab
|
Very small (not surveyed)
|
Sunni Turkmen
|
Non-negligible
|
Bashiqa
(7% of population in Mosul)
|
Ezidi
|
Major
|
Syriac Orthodox
|
Minor
|
Sunni Arab
|
Minor
|
Shoura
(4% of population in Mosul)
|
Sunni Arab
|
Major
|
Hammam al-alil
(6% of population in Mosul)
|
Sunni Arab
|
Major
|
Qayarra
(7% of population in Mosul)
|
Sunni Arab
|
Major
|
Mahalabia
(3% of population in Mosul)
|
Sunni Turkmen
|
Major
|
Sunni Arab
|
Major
|
Qualitative Methods
Findings were supplemented by additional qualitative work. This included key informant interviews with government (e.g. mayors or mayor office representatives) and local civil society organizations. It also included validation sessions with community members.