Obtaining a Sample from a Partial Sampling Frame

A company is interested in compiling and selling a database of high-quality survey information. The survey sample should be representative but efficiently carried out, so complex sampling methods are used.

Table 1. Structure for full sampling design
Stage	Strata	Clusters
1	Region	Province
2	District	City
3	Subdivision

In the third stage, households are the primary sampling unit, and selected households will be surveyed. However, since information is easily available only to the city level, the company plans to execute the first two stages of the design now and then collect information on the numbers of subdivisions and households from the sampled cities. The available information to the city level is collected in demo_cs_1.sav. See the topic Sample Files for more information. Note that this file contains a variable Subdivision that contains all 1's. This is a placeholder for the "true" variable, whose values will be collected after the first two stages of the design are executed, that allows you to specify the full three-stage sampling design now. Use the Complex Samples Sampling Wizard to specify the full complex sampling design, and then draw the first two stages.