Sampling
Sampling Procedure
The Social Indicator Sample Survey is a household-based survey where households are defined as sampling units. Therefore, the households living in their administrative unit for 6 or more months or intended to live in for 6 or more months if not 6 months yet, are defined as sampling units in the survey concept.
The sample size is defined by having actual representation in urban-rural and regions (Western, Khangai, Central, Easternand Ulaanbaatar) when provides estimates of the survey result at the national level. In other words, 15500 households were selected with probability proportional to size at the national level and it is decided to select sampling units using household unit weight for each region or unit weight of the region’s households in the national rate.
Sample was selected in two stages. In the first stage, primary sampling units (baghs and khesegs) were selected with probability proportional to size. 25 households within each of these selected baghs and khesegs were selected using the systematic sampling method.
2012 official statistics of the household registration is used as a sampling range. As mentioned earlier, kheseg of khoroo's for Ulaanbaatar and baghs of soum's for aimags were defined as primary sampling units (PSUs). In total, 384 baghs of 236 soums of 21 aimags and 220 khesegs of 75 khoroos of 9 districts of Ulaanbaatar were covered by the survey and for each bagh and kheseg household lists were updated in May - July 2013. For reporting results, sample weights are used.
